diff --git a/.mps/modules.xml b/.mps/modules.xml
index 7bc519f..03ef27c 100644
--- a/.mps/modules.xml
+++ b/.mps/modules.xml
@@ -3,6 +3,7 @@
   <component name="MPSProject">
     <projectModules>
       <modulePath path="$PROJECT_DIR$/languages/MultiRefLang/MultiRefLang.mpl" folder="test.langs" />
+      <modulePath path="$PROJECT_DIR$/languages/io.lionweb.mps.converter.TestAbstract/io.lionweb.mps.converter.TestAbstract.mpl" folder="test.langs" />
       <modulePath path="$PROJECT_DIR$/languages/io.lionweb.mps.converter.TestAllBuiltins/io.lionweb.mps.converter.TestAllBuiltins.mpl" folder="test.langs" />
       <modulePath path="$PROJECT_DIR$/languages/io.lionweb.mps.converter.TestAnnotation/io.lionweb.mps.converter.TestAnnotation.mpl" folder="test.langs" />
       <modulePath path="$PROJECT_DIR$/languages/io.lionweb.mps.converter.TestCoreRefLang/io.lionweb.mps.converter.TestCoreRefLang.mpl" folder="test.langs" />
diff --git a/build.xml b/build.xml
index 8e5e5a7..13a75b9 100644
--- a/build.xml
+++ b/build.xml
@@ -506,6 +506,7 @@
           <module ref="d936855b-48da-4812-a8a0-2bfddd633ac5(jetbrains.mps.lang.behavior.api)" kind="rt" />
           <module ref="d936855b-48da-4812-a8a0-2bfddd633ac4(jetbrains.mps.lang.behavior.runtime)" kind="rt" />
           <module ref="9a4afe51-f114-4595-b5df-048ce3c596be(jetbrains.mps.runtime)" kind="rt" />
+          <module ref="3f233e7f-b8a6-46d2-a57f-795d56775243(Annotations)" kind="cl" />
           <module ref="6354ebe7-c22a-4a0f-ac54-50b52ab9b065(JDK)" kind="cl" />
           <module ref="6ed54515-acc8-4d1e-a16c-9fd6cfe951ea(MPS.Core)" kind="cl" />
           <module ref="1ed103c3-3aa6-49b7-9c21-6765ee11f224(MPS.Editor)" kind="cl" />
@@ -2561,6 +2562,68 @@
       <zipfileset file="${lionweb-mps.home}/languages/io.lionweb.mps.converter.deps.AvoidMultipleConcepts/io.lionweb.mps.converter.deps.AvoidMultipleConcepts.mpl" prefix="module" />
       <zipfileset dir="${build.tmp}/customProcessors/copyModels/languages-io.lionweb.mps.converter.deps.AvoidMultipleConcepts-models" prefix="module/models" />
     </jar>
+    <mkdir dir="${build.tmp}/default/io.lionweb.mps.converter.TestAbstract.jar" />
+    <mkdir dir="${build.tmp}/default/io.lionweb.mps.converter.TestAbstract.jar/META-INF" />
+    <echoxml file="${build.tmp}/default/io.lionweb.mps.converter.TestAbstract.jar/META-INF/module.xml">
+      <module namespace="io.lionweb.mps.converter.TestAbstract" type="language" uuid="3ecd737b-418b-4a70-a991-f6b83f0e3247">
+        <dependencies>
+          <module ref="6354ebe7-c22a-4a0f-ac54-50b52ab9b065(JDK)" kind="rt" />
+          <module ref="6ed54515-acc8-4d1e-a16c-9fd6cfe951ea(MPS.Core)" kind="rt" />
+          <module ref="1ed103c3-3aa6-49b7-9c21-6765ee11f224(MPS.Editor)" kind="rt" />
+          <module ref="8865b7a8-5271-43d3-884c-6fd1d9cfdd34(MPS.OpenAPI)" kind="rt" />
+          <module ref="4c6a28d1-2c60-478d-b36e-db9b3cbb21fb(closures.runtime)" kind="rt" />
+          <module ref="9b80526e-f0bf-4992-bdf5-cee39c1833f3(collections.runtime)" kind="rt" />
+          <module ref="a3e4657f-a76c-45bb-bbda-c764596ecc65(jetbrains.mps.baseLanguage.logging.runtime)" kind="rt" />
+          <module ref="52b81ac7-93fd-4e9e-b972-4995882da6d4(jetbrains.mps.baseLanguage.references.runtime)" kind="rt" />
+          <module ref="d44dab97-aaac-44cb-9745-8a14db674c03(jetbrains.mps.baseLanguage.tuples.runtime)" kind="rt" />
+          <module ref="d936855b-48da-4812-a8a0-2bfddd633ac5(jetbrains.mps.lang.behavior.api)" kind="rt" />
+          <module ref="d936855b-48da-4812-a8a0-2bfddd633ac4(jetbrains.mps.lang.behavior.runtime)" kind="rt" />
+          <module ref="9a4afe51-f114-4595-b5df-048ce3c596be(jetbrains.mps.runtime)" kind="rt" />
+          <module ref="a9e4c532-c5f5-4bb7-99ef-42abb73bbb70(jetbrains.mps.lang.descriptor.aspects)" kind="cl" />
+        </dependencies>
+        <uses>
+          <language id="l:411e5b27-8a76-482e-8af8-1704262b4468:io.lionweb.mps.structure.attribute" />
+          <language id="l:f3061a53-9226-4cc5-a443-f952ceaf5816:jetbrains.mps.baseLanguage" />
+          <language id="l:fd392034-7849-419d-9071-12563d152375:jetbrains.mps.baseLanguage.closures" />
+          <language id="l:83888646-71ce-4f1c-9c53-c54016f6ad4f:jetbrains.mps.baseLanguage.collections" />
+          <language id="l:f2801650-65d5-424e-bb1b-463a8781b786:jetbrains.mps.baseLanguage.javadoc" />
+          <language id="l:760a0a8c-eabb-4521-8bfd-65db761a9ba3:jetbrains.mps.baseLanguage.logging" />
+          <language id="l:a247e09e-2435-45ba-b8d2-07e93feba96a:jetbrains.mps.baseLanguage.tuples" />
+          <language id="l:aee9cad2-acd4-4608-aef2-0004f6a1cdbd:jetbrains.mps.lang.actions" />
+          <language id="l:af65afd8-f0dd-4942-87d9-63a55f2a9db1:jetbrains.mps.lang.behavior" />
+          <language id="l:f4ad079d-bc71-4ffb-9600-9328705cf998:jetbrains.mps.lang.descriptor" />
+          <language id="l:18bc6592-03a6-4e29-a83a-7ff23bde13ba:jetbrains.mps.lang.editor" />
+          <language id="l:3a13115c-633c-4c5c-bbcc-75c4219e9555:jetbrains.mps.lang.quotation" />
+          <language id="l:982eb8df-2c96-4bd7-9963-11712ea622e5:jetbrains.mps.lang.resources" />
+          <language id="l:7866978e-a0f0-4cc7-81bc-4d213d9375e1:jetbrains.mps.lang.smodel" />
+          <language id="l:c72da2b9-7cce-4447-8389-f407dc1158b7:jetbrains.mps.lang.structure" />
+          <language id="l:c7fb639f-be78-4307-89b0-b5959c3fa8c8:jetbrains.mps.lang.text" />
+        </uses>
+        <classpath>
+          <entry path="." />
+        </classpath>
+        <sources jar="io.lionweb.mps.converter.TestAbstract-src.jar" descriptor="io.lionweb.mps.converter.TestAbstract.mpl" />
+      </module>
+    </echoxml>
+    <jar destfile="${build.layout}/io.lionweb.mps.tests.contributions/languages/lionweb-mps-tests.contributions/io.lionweb.mps.converter.TestAbstract.jar" duplicate="preserve">
+      <fileset dir="${build.tmp}/java/out/io.lionweb.mps.converter.TestAbstract" />
+      <fileset dir="${lionweb-mps.home}/languages/io.lionweb.mps.converter.TestAbstract" includes="icons/**" />
+      <fileset dir="${lionweb-mps.home}/languages/io.lionweb.mps.converter.TestAbstract/source_gen" includes="**/trace.info, **/exports, **/*.mps, **/checkpoints" />
+      <fileset dir="${build.tmp}/default/io.lionweb.mps.converter.TestAbstract.jar" />
+    </jar>
+    <copyModels todir="${build.tmp}/customProcessors/copyModels/languages-io.lionweb.mps.converter.TestAbstract-models">
+      <fileset dir="${lionweb-mps.home}/languages/io.lionweb.mps.converter.TestAbstract/models" includes="**/*.mps, **/*.mpsr, **/.model" />
+    </copyModels>
+    <jar destfile="${build.layout}/io.lionweb.mps.tests.contributions/languages/lionweb-mps-tests.contributions/io.lionweb.mps.converter.TestAbstract-src.jar" duplicate="preserve">
+      <fileset dir="${lionweb-mps.home}/languages/io.lionweb.mps.converter.TestAbstract/source_gen">
+        <exclude name="**/trace.info" />
+        <exclude name="**/exports" />
+        <exclude name="**/checkpoints" />
+        <exclude name="**/*.mps" />
+      </fileset>
+      <zipfileset file="${lionweb-mps.home}/languages/io.lionweb.mps.converter.TestAbstract/io.lionweb.mps.converter.TestAbstract.mpl" prefix="module" />
+      <zipfileset dir="${build.tmp}/customProcessors/copyModels/languages-io.lionweb.mps.converter.TestAbstract-models" prefix="module/models" />
+    </jar>
     <mkdir dir="${build.tmp}/default/io.lionweb.mps.converter.test.support.jar" />
     <mkdir dir="${build.tmp}/default/io.lionweb.mps.converter.test.support.jar/META-INF" />
     <echoxml file="${build.tmp}/default/io.lionweb.mps.converter.test.support.jar/META-INF/module.xml">
@@ -2743,12 +2806,14 @@
           <module ref="e55e6749-03cb-4ea7-9695-2322bab791c1(jetbrains.mps.lang.test.matcher)" kind="rt" />
           <module ref="707c4fde-f79a-44b5-b3d7-b5cef8844ccf(jetbrains.mps.lang.test.runtime)" kind="rt" />
           <module ref="9a4afe51-f114-4595-b5df-048ce3c596be(jetbrains.mps.runtime)" kind="rt" />
+          <module ref="3f233e7f-b8a6-46d2-a57f-795d56775243(Annotations)" kind="cl" />
           <module ref="6354ebe7-c22a-4a0f-ac54-50b52ab9b065(JDK)" kind="cl" />
           <module ref="6ed54515-acc8-4d1e-a16c-9fd6cfe951ea(MPS.Core)" kind="cl" />
           <module ref="8865b7a8-5271-43d3-884c-6fd1d9cfdd34(MPS.OpenAPI)" kind="cl" />
           <module ref="76d927fd-3a5a-4e40-865b-7c2d329ca675(MultiRefLang)" kind="cl" />
           <module ref="9d6d7230-3178-4b3f-a837-7c0180c86207(io.lionweb.lionweb.java)" kind="cl" />
           <module ref="4d96f781-5fa4-4d94-817a-c51f74fdf43f(io.lionweb.mps.converter)" kind="cl" />
+          <module ref="3ecd737b-418b-4a70-a991-f6b83f0e3247(io.lionweb.mps.converter.TestAbstract)" kind="cl" />
           <module ref="08caad75-8246-4427-bb4d-8444b6c5c729(io.lionweb.mps.converter.TestLang)" kind="cl" />
           <module ref="48d0f6eb-6186-4cec-83d1-7caedb05a494(io.lionweb.mps.converter.TestLang2)" kind="cl" />
           <module ref="099490a3-1e39-4ed1-bebc-8027665cecf9(io.lionweb.mps.converter.TestLang3)" kind="cl" />
@@ -2764,6 +2829,7 @@
         </dependencies>
         <uses>
           <language id="l:76d927fd-3a5a-4e40-865b-7c2d329ca675:MultiRefLang" />
+          <language id="l:3ecd737b-418b-4a70-a991-f6b83f0e3247:io.lionweb.mps.converter.TestAbstract" />
           <language id="l:afd6d8a2-5e3b-49d1-ab82-c9cb7dc063bb:io.lionweb.mps.converter.TestAnnotation" />
           <language id="l:11541b24-a02a-4586-a931-92521b3f6166:io.lionweb.mps.converter.TestCustomDatatype" />
           <language id="l:08caad75-8246-4427-bb4d-8444b6c5c729:io.lionweb.mps.converter.TestLang" />
@@ -2906,7 +2972,7 @@
     <delete dir="${build.layout}" />
   </target>
   
-  <target name="compileJava" depends="java.compile.io.lionweb.mps.m3, java.compile.io.lionweb.mps.m3.runtime, java.compile.io.lionweb.mps.structure.attribute, java.compile.io.lionweb.mps.specific, java.compile.io.lionweb.mps.server.plugin, java.compile.io.lionweb.mps.converter, java.compile.io.lionweb.mps.json, java.compile.java.modules.cycle.1, java.compile.io.lionweb.mps.converter.lang, java.compile.io.lionweb.mps.converter.lang.runtime, java.compile.io.lionweb.mps.client.connector, java.compile.io.lionweb.mps.client.ideaPlugin, java.compile.io.lionweb.mps.client.persistence, java.compile.io.lionweb.mps.cmdline, java.compile.io.lionweb.mps.build, java.compile.io.lionweb.mps.converter.TestAllBuiltins, java.compile.io.lionweb.mps.testsupport, java.compile.io.lionweb.mps.testsupport.generator, java.compile.io.lionweb.mps.converter.TestLang, java.compile.io.lionweb.mps.converter.TestLang2, java.compile.io.lionweb.mps.converter.TestLang3, java.compile.library, java.compile.MultiRefLang, java.compile.io.lionweb.mps.converter.TestCoreRefLang, java.compile.io.lionweb.mps.converter.TestCustomDatatype, java.compile.io.lionweb.mps.converter.TestAnnotation, java.compile.io.lionweb.mps.converter.TestRefs, java.compile.io.lionweb.mps.converter.deps.AnnotationAnnotates, java.compile.io.lionweb.mps.converter.deps.AnnotationAnnotates_Node, java.compile.io.lionweb.mps.converter.deps.AnnotationExtends, java.compile.io.lionweb.mps.converter.deps.AnnotationImplements, java.compile.io.lionweb.mps.converter.deps.ConceptExtends, java.compile.io.lionweb.mps.converter.deps.ConceptImplements, java.compile.io.lionweb.mps.converter.deps.ContainmentType, java.compile.io.lionweb.mps.converter.deps.InterfaceExtends, java.compile.io.lionweb.mps.converter.deps.LanguageDepends, java.compile.io.lionweb.mps.converter.deps.OnlyBuiltins, java.compile.io.lionweb.mps.converter.deps.PropertyType, java.compile.io.lionweb.mps.converter.deps.ReferenceType, java.compile.io.lionweb.mps.converter.deps.SmartReferenceType, java.compile.io.lionweb.mps.converter.deps.Standalone, java.compile.io.lionweb.mps.converter.deps.AvoidMultipleConcepts, java.compile.io.lionweb.mps.converter.test.support, java.compile.io.lionweb.mps.json.test.support, java.compile.io.lionweb.mps.lang.test, java.compile.io.lionweb.mps.json.test, java.compile.io.lionweb.mps.converter.test" />
+  <target name="compileJava" depends="java.compile.io.lionweb.mps.m3, java.compile.io.lionweb.mps.m3.runtime, java.compile.io.lionweb.mps.structure.attribute, java.compile.io.lionweb.mps.specific, java.compile.io.lionweb.mps.server.plugin, java.compile.io.lionweb.mps.converter, java.compile.io.lionweb.mps.json, java.compile.java.modules.cycle.1, java.compile.io.lionweb.mps.converter.lang, java.compile.io.lionweb.mps.converter.lang.runtime, java.compile.io.lionweb.mps.client.connector, java.compile.io.lionweb.mps.client.ideaPlugin, java.compile.io.lionweb.mps.client.persistence, java.compile.io.lionweb.mps.cmdline, java.compile.io.lionweb.mps.build, java.compile.io.lionweb.mps.converter.TestAllBuiltins, java.compile.io.lionweb.mps.testsupport, java.compile.io.lionweb.mps.testsupport.generator, java.compile.io.lionweb.mps.converter.TestLang, java.compile.io.lionweb.mps.converter.TestLang2, java.compile.io.lionweb.mps.converter.TestLang3, java.compile.library, java.compile.MultiRefLang, java.compile.io.lionweb.mps.converter.TestCoreRefLang, java.compile.io.lionweb.mps.converter.TestCustomDatatype, java.compile.io.lionweb.mps.converter.TestAnnotation, java.compile.io.lionweb.mps.converter.TestRefs, java.compile.io.lionweb.mps.converter.deps.AnnotationAnnotates, java.compile.io.lionweb.mps.converter.deps.AnnotationAnnotates_Node, java.compile.io.lionweb.mps.converter.deps.AnnotationExtends, java.compile.io.lionweb.mps.converter.deps.AnnotationImplements, java.compile.io.lionweb.mps.converter.deps.ConceptExtends, java.compile.io.lionweb.mps.converter.deps.ConceptImplements, java.compile.io.lionweb.mps.converter.deps.ContainmentType, java.compile.io.lionweb.mps.converter.deps.InterfaceExtends, java.compile.io.lionweb.mps.converter.deps.LanguageDepends, java.compile.io.lionweb.mps.converter.deps.OnlyBuiltins, java.compile.io.lionweb.mps.converter.deps.PropertyType, java.compile.io.lionweb.mps.converter.deps.ReferenceType, java.compile.io.lionweb.mps.converter.deps.SmartReferenceType, java.compile.io.lionweb.mps.converter.deps.Standalone, java.compile.io.lionweb.mps.converter.deps.AvoidMultipleConcepts, java.compile.io.lionweb.mps.converter.TestAbstract, java.compile.io.lionweb.mps.converter.test.support, java.compile.io.lionweb.mps.json.test.support, java.compile.io.lionweb.mps.lang.test, java.compile.io.lionweb.mps.json.test, java.compile.io.lionweb.mps.converter.test" />
   
   <target name="processResources" />
   
@@ -3057,6 +3123,7 @@
       </chunk>
       <chunk>
         <module file="${lionweb-mps.home}/languages/MultiRefLang/MultiRefLang.mpl" />
+        <module file="${lionweb-mps.home}/languages/io.lionweb.mps.converter.TestAbstract/io.lionweb.mps.converter.TestAbstract.mpl" />
         <module file="${lionweb-mps.home}/languages/io.lionweb.mps.converter.TestAllBuiltins/io.lionweb.mps.converter.TestAllBuiltins.mpl" />
         <module file="${lionweb-mps.home}/languages/io.lionweb.mps.converter.TestAnnotation/io.lionweb.mps.converter.TestAnnotation.mpl" />
         <module file="${lionweb-mps.home}/languages/io.lionweb.mps.converter.TestCustomDatatype/io.lionweb.mps.converter.TestCustomDatatype.mpl" />
@@ -5138,6 +5205,55 @@
     </copy>
   </target>
   
+  <target name="java.compile.io.lionweb.mps.converter.TestAbstract" depends="fetchDependencies">
+    <mkdir dir="${lionweb-mps.home}/languages/io.lionweb.mps.converter.TestAbstract/source_gen" />
+    <mkdir dir="${build.tmp}/java/out/io.lionweb.mps.converter.TestAbstract" />
+    <javac destdir="${build.tmp}/java/out/io.lionweb.mps.converter.TestAbstract" fork="false" encoding="utf8" includeantruntime="false" debug="true">
+      <compilerarg value="-Xlint:none" />
+      <src>
+        <path location="${lionweb-mps.home}/languages/io.lionweb.mps.converter.TestAbstract/source_gen" />
+      </src>
+      <classpath>
+        <fileset file="${artifacts.mps}/lib/mps-core.jar" />
+        <fileset file="${artifacts.mps}/lib/mps-platform.jar" />
+        <fileset file="${artifacts.mps}/lib/mps-annotations.jar" />
+        <fileset file="${artifacts.mps}/lib/mps-behavior-api.jar" />
+        <fileset file="${artifacts.mps}/lib/mps-behavior-runtime.jar" />
+        <fileset file="${artifacts.mps}/lib/mps-closures.jar" />
+        <fileset file="${artifacts.mps}/lib/mps-collections.jar" />
+        <fileset file="${artifacts.mps}/lib/mps-openapi.jar" />
+        <fileset file="${artifacts.mps}/lib/mps-logging.jar" />
+        <fileset file="${artifacts.mps}/lib/mps-tuples.jar" />
+        <fileset file="${artifacts.mps}/lib/mps-references.jar" />
+        <fileset file="${artifacts.mps}/lib/mps-messaging.jar" />
+        <fileset file="${artifacts.mps}/lib/mps-boot-util.jar" />
+        <fileset file="${artifacts.mps}/lib/mps-context.jar" />
+        <fileset file="${artifacts.mps}/lib/mps-constraints-runtime.jar" />
+        <fileset file="${artifacts.mps}/lib/mps-editor.jar" />
+        <fileset file="${artifacts.mps}/lib/mps-editor-api.jar" />
+        <fileset file="${artifacts.mps}/lib/mps-editor-runtime.jar" />
+        <fileset file="${artifacts.mps}/lib/mps-generator.jar" />
+        <fileset file="${artifacts.mps}/lib/mps-persistence.jar" />
+        <fileset file="${artifacts.mps}/lib/mps-environment.jar" />
+        <fileset file="${artifacts.mps}/lib/mps-project-check.jar" />
+        <fileset file="${artifacts.mps}/lib/mps-textgen.jar" />
+        <fileset dir="${artifacts.IDEA}/lib" includes="*.jar" />
+        <fileset file="${artifacts.IDEA}/lib/annotations.jar" />
+        <fileset file="${artifacts.IDEA}/lib/log4j.jar" />
+        <fileset file="${artifacts.IDEA}/lib/jdom.jar" />
+        <fileset file="${artifacts.IDEA}/lib/trove4j.jar" />
+        <fileset file="${artifacts.IDEA}/lib/ecj-4.16.jar" />
+        <fileset file="${artifacts.IDEA}/plugins/java/lib/ecj-4.16.jar" />
+        <fileset file="${artifacts.mps}/languages/baseLanguage/jetbrains.mps.baseLanguage.logging.runtime.jar" />
+        <fileset file="${artifacts.mps}/languages/languageDesign/jetbrains.mps.lang.core.jar" />
+        <fileset file="${artifacts.mps}/languages/languageDesign/jetbrains.mps.lang.descriptor.aspects.jar" />
+      </classpath>
+    </javac>
+    <copy todir="${build.tmp}/java/out/io.lionweb.mps.converter.TestAbstract">
+      <fileset dir="${lionweb-mps.home}/languages/io.lionweb.mps.converter.TestAbstract/source_gen" excludes="**/*.java" />
+    </copy>
+  </target>
+  
   <target name="java.compile.io.lionweb.mps.converter.test.support" depends="java.compile.io.lionweb.mps.converter, java.compile.io.lionweb.mps.m3, java.compile.io.lionweb.mps.m3.runtime, fetchDependencies">
     <mkdir dir="${lionweb-mps.home}/solutions/io.lionweb.mps.converter.test.support/source_gen" />
     <mkdir dir="${build.tmp}/java/out/io.lionweb.mps.converter.test.support" />
@@ -5313,7 +5429,7 @@
     </copy>
   </target>
   
-  <target name="java.compile.io.lionweb.mps.json.test" depends="java.compile.MultiRefLang, java.compile.io.lionweb.mps.converter, java.compile.io.lionweb.mps.converter.TestLang, java.compile.io.lionweb.mps.converter.TestLang2, java.compile.io.lionweb.mps.converter.TestLang3, java.compile.io.lionweb.mps.converter.TestRefs, java.compile.io.lionweb.mps.converter.lang.runtime, java.compile.io.lionweb.mps.converter.test.support, java.compile.io.lionweb.mps.json, java.compile.io.lionweb.mps.json.test.support, java.compile.io.lionweb.mps.m3, java.compile.io.lionweb.mps.m3.runtime, java.compile.io.lionweb.mps.testsupport, java.compile.library, fetchDependencies">
+  <target name="java.compile.io.lionweb.mps.json.test" depends="java.compile.MultiRefLang, java.compile.io.lionweb.mps.converter, java.compile.io.lionweb.mps.converter.TestAbstract, java.compile.io.lionweb.mps.converter.TestLang, java.compile.io.lionweb.mps.converter.TestLang2, java.compile.io.lionweb.mps.converter.TestLang3, java.compile.io.lionweb.mps.converter.TestRefs, java.compile.io.lionweb.mps.converter.lang.runtime, java.compile.io.lionweb.mps.converter.test.support, java.compile.io.lionweb.mps.json, java.compile.io.lionweb.mps.json.test.support, java.compile.io.lionweb.mps.m3, java.compile.io.lionweb.mps.m3.runtime, java.compile.io.lionweb.mps.testsupport, java.compile.library, fetchDependencies">
     <mkdir dir="${lionweb-mps.home}/solutions/io.lionweb.mps.json.test/test_gen" />
     <mkdir dir="${build.tmp}/java/out/io.lionweb.mps.json.test" />
     <javac destdir="${build.tmp}/java/out/io.lionweb.mps.json.test" fork="false" encoding="utf8" includeantruntime="false" debug="true">
@@ -5348,6 +5464,7 @@
         <fileset file="${artifacts.mps}/lib/mps-editor-runtime.jar" />
         <fileset file="${artifacts.mps}/lib/mps-environment.jar" />
         <pathelement path="${build.tmp}/java/out/io.lionweb.mps.converter" />
+        <pathelement path="${build.tmp}/java/out/io.lionweb.mps.converter.TestAbstract" />
         <pathelement path="${build.tmp}/java/out/io.lionweb.mps.converter.TestLang" />
         <pathelement path="${build.tmp}/java/out/io.lionweb.mps.converter.TestLang2" />
         <pathelement path="${build.tmp}/java/out/io.lionweb.mps.converter.TestLang3" />
@@ -5599,6 +5716,7 @@
       <pathelement location="${build.layout}/io.lionweb.mps.tests.contributions/languages/lionweb-mps-tests.contributions/MultiRefLang.jar" />
       <pathelement location="${build.layout}/io.lionweb.mps/languages/lionweb-mps.json/io.lionweb.lionweb.java.jar" />
       <pathelement location="${build.layout}/io.lionweb.mps/languages/lionweb-mps.converter/io.lionweb.mps.converter.jar" />
+      <pathelement location="${build.layout}/io.lionweb.mps.tests.contributions/languages/lionweb-mps-tests.contributions/io.lionweb.mps.converter.TestAbstract.jar" />
       <pathelement location="${build.layout}/io.lionweb.mps.tests.contributions/languages/lionweb-mps-tests.contributions/io.lionweb.mps.converter.TestAnnotation.jar" />
       <pathelement location="${build.layout}/io.lionweb.mps.tests.contributions/languages/lionweb-mps-tests.contributions/io.lionweb.mps.converter.TestCoreRefLang.jar" />
       <pathelement location="${build.layout}/io.lionweb.mps.tests.contributions/languages/lionweb-mps-tests.contributions/io.lionweb.mps.converter.TestCustomDatatype.jar" />
@@ -5696,6 +5814,7 @@
     <delete dir="${lionweb-mps.home}/languages/io.lionweb.mps.testsupport/generator/source_gen" />
     <delete dir="${lionweb-mps.home}/languages/library/source_gen" />
     <delete dir="${lionweb-mps.home}/languages/MultiRefLang/source_gen" />
+    <delete dir="${lionweb-mps.home}/languages/io.lionweb.mps.converter.TestAbstract/source_gen" />
     <delete dir="${lionweb-mps.home}/languages/io.lionweb.mps.converter.TestAllBuiltins/source_gen" />
     <delete dir="${lionweb-mps.home}/languages/io.lionweb.mps.converter.TestAnnotation/source_gen" />
     <delete dir="${lionweb-mps.home}/languages/io.lionweb.mps.converter.TestCustomDatatype/source_gen" />
diff --git a/changelog.md b/changelog.md
index 2624c2e..6de84ea 100644
--- a/changelog.md
+++ b/changelog.md
@@ -1,6 +1,8 @@
 # Changelog for LionWeb-MPS
 
 ## Next
+* Filter nodes of abstract concepts or interfaces from exporting to LionWeb JSON. 
+
 * Updated both technical and reference documentation.
 
 * Added intentions to assign LionWeb keys to all elements of a language.
diff --git a/languages/io.lionweb.mps.converter.TestAbstract/io.lionweb.mps.converter.TestAbstract.mpl b/languages/io.lionweb.mps.converter.TestAbstract/io.lionweb.mps.converter.TestAbstract.mpl
new file mode 100644
index 0000000..707bdd6
--- /dev/null
+++ b/languages/io.lionweb.mps.converter.TestAbstract/io.lionweb.mps.converter.TestAbstract.mpl
@@ -0,0 +1,48 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<language namespace="io.lionweb.mps.converter.TestAbstract" uuid="3ecd737b-418b-4a70-a991-f6b83f0e3247" languageVersion="0" moduleVersion="0">
+  <models>
+    <modelRoot contentPath="${module}" type="default">
+      <sourceRoot location="models" />
+    </modelRoot>
+  </models>
+  <facets>
+    <facet type="java">
+      <classes generated="true" path="${module}/classes_gen" />
+    </facet>
+  </facets>
+  <accessoryModels />
+  <sourcePath />
+  <languageVersions>
+    <language slang="l:411e5b27-8a76-482e-8af8-1704262b4468:io.lionweb.mps.structure.attribute" version="0" />
+    <language slang="l:f3061a53-9226-4cc5-a443-f952ceaf5816:jetbrains.mps.baseLanguage" version="11" />
+    <language slang="l:443f4c36-fcf5-4eb6-9500-8d06ed259e3e:jetbrains.mps.baseLanguage.classifiers" version="0" />
+    <language slang="l:fd392034-7849-419d-9071-12563d152375:jetbrains.mps.baseLanguage.closures" version="0" />
+    <language slang="l:83888646-71ce-4f1c-9c53-c54016f6ad4f:jetbrains.mps.baseLanguage.collections" version="1" />
+    <language slang="l:f2801650-65d5-424e-bb1b-463a8781b786:jetbrains.mps.baseLanguage.javadoc" version="2" />
+    <language slang="l:760a0a8c-eabb-4521-8bfd-65db761a9ba3:jetbrains.mps.baseLanguage.logging" version="0" />
+    <language slang="l:a247e09e-2435-45ba-b8d2-07e93feba96a:jetbrains.mps.baseLanguage.tuples" version="0" />
+    <language slang="l:aee9cad2-acd4-4608-aef2-0004f6a1cdbd:jetbrains.mps.lang.actions" version="4" />
+    <language slang="l:af65afd8-f0dd-4942-87d9-63a55f2a9db1:jetbrains.mps.lang.behavior" version="2" />
+    <language slang="l:ceab5195-25ea-4f22-9b92-103b95ca8c0c:jetbrains.mps.lang.core" version="2" />
+    <language slang="l:f4ad079d-bc71-4ffb-9600-9328705cf998:jetbrains.mps.lang.descriptor" version="0" />
+    <language slang="l:18bc6592-03a6-4e29-a83a-7ff23bde13ba:jetbrains.mps.lang.editor" version="14" />
+    <language slang="l:446c26eb-2b7b-4bf0-9b35-f83fa582753e:jetbrains.mps.lang.modelapi" version="0" />
+    <language slang="l:3a13115c-633c-4c5c-bbcc-75c4219e9555:jetbrains.mps.lang.quotation" version="5" />
+    <language slang="l:982eb8df-2c96-4bd7-9963-11712ea622e5:jetbrains.mps.lang.resources" version="2" />
+    <language slang="l:7866978e-a0f0-4cc7-81bc-4d213d9375e1:jetbrains.mps.lang.smodel" version="18" />
+    <language slang="l:c72da2b9-7cce-4447-8389-f407dc1158b7:jetbrains.mps.lang.structure" version="9" />
+    <language slang="l:c7fb639f-be78-4307-89b0-b5959c3fa8c8:jetbrains.mps.lang.text" version="0" />
+    <language slang="l:9ded098b-ad6a-4657-bfd9-48636cfe8bc3:jetbrains.mps.lang.traceable" version="0" />
+  </languageVersions>
+  <dependencyVersions>
+    <module reference="3f233e7f-b8a6-46d2-a57f-795d56775243(Annotations)" version="0" />
+    <module reference="6354ebe7-c22a-4a0f-ac54-50b52ab9b065(JDK)" version="0" />
+    <module reference="6ed54515-acc8-4d1e-a16c-9fd6cfe951ea(MPS.Core)" version="0" />
+    <module reference="8865b7a8-5271-43d3-884c-6fd1d9cfdd34(MPS.OpenAPI)" version="0" />
+    <module reference="3ecd737b-418b-4a70-a991-f6b83f0e3247(io.lionweb.mps.converter.TestAbstract)" version="0" />
+    <module reference="ceab5195-25ea-4f22-9b92-103b95ca8c0c(jetbrains.mps.lang.core)" version="0" />
+    <module reference="a9e4c532-c5f5-4bb7-99ef-42abb73bbb70(jetbrains.mps.lang.descriptor.aspects)" version="0" />
+  </dependencyVersions>
+  <extendedLanguages />
+</language>
+
diff --git a/languages/io.lionweb.mps.converter.TestAbstract/models/io.lionweb.mps.converter.TestAbstract.behavior.mps b/languages/io.lionweb.mps.converter.TestAbstract/models/io.lionweb.mps.converter.TestAbstract.behavior.mps
new file mode 100644
index 0000000..3894903
--- /dev/null
+++ b/languages/io.lionweb.mps.converter.TestAbstract/models/io.lionweb.mps.converter.TestAbstract.behavior.mps
@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<model ref="r:0478e58a-48be-465a-8746-cdda32500d67(io.lionweb.mps.converter.TestAbstract.behavior)">
+  <persistence version="9" />
+  <languages>
+    <use id="7866978e-a0f0-4cc7-81bc-4d213d9375e1" name="jetbrains.mps.lang.smodel" version="18" />
+    <use id="af65afd8-f0dd-4942-87d9-63a55f2a9db1" name="jetbrains.mps.lang.behavior" version="2" />
+    <devkit ref="fbc25dd2-5da4-483a-8b19-70928e1b62d7(jetbrains.mps.devkit.general-purpose)" />
+  </languages>
+  <imports />
+  <registry />
+</model>
+
diff --git a/languages/io.lionweb.mps.converter.TestAbstract/models/io.lionweb.mps.converter.TestAbstract.editor.mps b/languages/io.lionweb.mps.converter.TestAbstract/models/io.lionweb.mps.converter.TestAbstract.editor.mps
new file mode 100644
index 0000000..fcec53e
--- /dev/null
+++ b/languages/io.lionweb.mps.converter.TestAbstract/models/io.lionweb.mps.converter.TestAbstract.editor.mps
@@ -0,0 +1,49 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<model ref="r:afd9773d-b2e7-47c8-846a-0af196ddacb4(io.lionweb.mps.converter.TestAbstract.editor)">
+  <persistence version="9" />
+  <languages>
+    <use id="18bc6592-03a6-4e29-a83a-7ff23bde13ba" name="jetbrains.mps.lang.editor" version="14" />
+    <use id="aee9cad2-acd4-4608-aef2-0004f6a1cdbd" name="jetbrains.mps.lang.actions" version="4" />
+    <devkit ref="fbc25dd2-5da4-483a-8b19-70928e1b62d7(jetbrains.mps.devkit.general-purpose)" />
+  </languages>
+  <imports>
+    <import index="nnlr" ref="r:a08e442f-c741-4fbc-a54c-eca0c8e3790c(io.lionweb.mps.converter.TestAbstract.structure)" implicit="true" />
+    <import index="tpco" ref="r:00000000-0000-4000-0000-011c89590284(jetbrains.mps.lang.core.editor)" implicit="true" />
+  </imports>
+  <registry>
+    <language id="18bc6592-03a6-4e29-a83a-7ff23bde13ba" name="jetbrains.mps.lang.editor">
+      <concept id="1071666914219" name="jetbrains.mps.lang.editor.structure.ConceptEditorDeclaration" flags="ig" index="24kQdi" />
+      <concept id="1080736578640" name="jetbrains.mps.lang.editor.structure.BaseEditorComponent" flags="ig" index="2wURMF">
+        <child id="1080736633877" name="cellModel" index="2wV5jI" />
+      </concept>
+      <concept id="1078939183254" name="jetbrains.mps.lang.editor.structure.CellModel_Component" flags="sg" stub="3162947552742194261" index="PMmxH">
+        <reference id="1078939183255" name="editorComponent" index="PMmxG" />
+      </concept>
+      <concept id="1073389577006" name="jetbrains.mps.lang.editor.structure.CellModel_Constant" flags="sn" stub="3610246225209162225" index="3F0ifn">
+        <property id="1073389577007" name="text" index="3F0ifm" />
+      </concept>
+      <concept id="1166049232041" name="jetbrains.mps.lang.editor.structure.AbstractComponent" flags="ng" index="1XWOmA">
+        <reference id="1166049300910" name="conceptDeclaration" index="1XX52x" />
+      </concept>
+    </language>
+  </registry>
+  <node concept="24kQdi" id="34Q84zM$yU3">
+    <ref role="1XX52x" to="nnlr:34Q84zM$f9f" resolve="AbstractInterface" />
+    <node concept="3F0ifn" id="34Q84zM$z2l" role="2wV5jI">
+      <property role="3F0ifm" value="AbstractInterface" />
+    </node>
+  </node>
+  <node concept="24kQdi" id="34Q84zM$BIQ">
+    <ref role="1XX52x" to="nnlr:34Q84zM$f97" resolve="AbstractConcept" />
+    <node concept="PMmxH" id="34Q84zM$BIS" role="2wV5jI">
+      <ref role="PMmxG" to="tpco:2wZex4PafBj" resolve="alias" />
+    </node>
+  </node>
+  <node concept="24kQdi" id="34Q84zM$BJk">
+    <ref role="1XX52x" to="nnlr:34Q84zM$f0U" resolve="AbstractPartition" />
+    <node concept="PMmxH" id="34Q84zM$BJm" role="2wV5jI">
+      <ref role="PMmxG" to="tpco:2wZex4PafBj" resolve="alias" />
+    </node>
+  </node>
+</model>
+
diff --git a/languages/io.lionweb.mps.converter.TestAbstract/models/io.lionweb.mps.converter.TestAbstract.structure.mps b/languages/io.lionweb.mps.converter.TestAbstract/models/io.lionweb.mps.converter.TestAbstract.structure.mps
new file mode 100644
index 0000000..9347b20
--- /dev/null
+++ b/languages/io.lionweb.mps.converter.TestAbstract/models/io.lionweb.mps.converter.TestAbstract.structure.mps
@@ -0,0 +1,94 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<model ref="r:a08e442f-c741-4fbc-a54c-eca0c8e3790c(io.lionweb.mps.converter.TestAbstract.structure)">
+  <persistence version="9" />
+  <languages>
+    <use id="c72da2b9-7cce-4447-8389-f407dc1158b7" name="jetbrains.mps.lang.structure" version="9" />
+    <use id="411e5b27-8a76-482e-8af8-1704262b4468" name="io.lionweb.mps.structure.attribute" version="0" />
+    <devkit ref="78434eb8-b0e5-444b-850d-e7c4ad2da9ab(jetbrains.mps.devkit.aspect.structure)" />
+  </languages>
+  <imports>
+    <import index="tpck" ref="r:00000000-0000-4000-0000-011c89590288(jetbrains.mps.lang.core.structure)" implicit="true" />
+  </imports>
+  <registry>
+    <language id="c72da2b9-7cce-4447-8389-f407dc1158b7" name="jetbrains.mps.lang.structure">
+      <concept id="2992811758677295509" name="jetbrains.mps.lang.structure.structure.AttributeInfo" flags="ng" index="M6xJ_" />
+      <concept id="1169125787135" name="jetbrains.mps.lang.structure.structure.AbstractConceptDeclaration" flags="ig" index="PkWjJ">
+        <property id="6714410169261853888" name="conceptId" index="EcuMT" />
+        <property id="4628067390765956802" name="abstract" index="R5$K7" />
+        <property id="5092175715804935370" name="conceptAlias" index="34LRSv" />
+      </concept>
+      <concept id="1169125989551" name="jetbrains.mps.lang.structure.structure.InterfaceConceptDeclaration" flags="ig" index="PlHQZ" />
+      <concept id="1071489090640" name="jetbrains.mps.lang.structure.structure.ConceptDeclaration" flags="ig" index="1TIwiD">
+        <property id="1096454100552" name="rootable" index="19KtqR" />
+        <reference id="1071489389519" name="extends" index="1TJDcQ" />
+      </concept>
+    </language>
+    <language id="ceab5195-25ea-4f22-9b92-103b95ca8c0c" name="jetbrains.mps.lang.core">
+      <concept id="1133920641626" name="jetbrains.mps.lang.core.structure.BaseConcept" flags="ng" index="2VYdi">
+        <child id="5169995583184591170" name="smodelAttribute" index="lGtFl" />
+      </concept>
+      <concept id="1169194658468" name="jetbrains.mps.lang.core.structure.INamedConcept" flags="ng" index="TrEIO">
+        <property id="1169194664001" name="name" index="TrG5h" />
+      </concept>
+    </language>
+    <language id="411e5b27-8a76-482e-8af8-1704262b4468" name="io.lionweb.mps.structure.attribute">
+      <concept id="6461713321120959620" name="io.lionweb.mps.structure.attribute.structure.LionWebPartitionConcept" flags="ng" index="3KvTa3">
+        <property id="6461713321120959627" name="partition" index="3KvTac" />
+      </concept>
+    </language>
+  </registry>
+  <node concept="1TIwiD" id="34Q84zM$f0U">
+    <property role="EcuMT" value="3546057254280163386" />
+    <property role="TrG5h" value="AbstractPartition" />
+    <property role="R5$K7" value="true" />
+    <property role="19KtqR" value="true" />
+    <property role="34LRSv" value="AbstractPartition" />
+    <ref role="1TJDcQ" to="tpck:gw2VY9q" resolve="BaseConcept" />
+    <node concept="3KvTa3" id="34Q84zM$f93" role="lGtFl">
+      <property role="3KvTac" value="true" />
+    </node>
+  </node>
+  <node concept="1TIwiD" id="34Q84zM$f95">
+    <property role="EcuMT" value="3546057254280163909" />
+    <property role="TrG5h" value="ConcretePartition" />
+    <property role="19KtqR" value="true" />
+    <property role="34LRSv" value="ConcretePartition" />
+    <ref role="1TJDcQ" to="tpck:gw2VY9q" resolve="BaseConcept" />
+    <node concept="3KvTa3" id="34Q84zM$f96" role="lGtFl">
+      <property role="3KvTac" value="true" />
+    </node>
+  </node>
+  <node concept="1TIwiD" id="34Q84zM$f97">
+    <property role="EcuMT" value="3546057254280163911" />
+    <property role="TrG5h" value="AbstractConcept" />
+    <property role="R5$K7" value="true" />
+    <property role="34LRSv" value="AbstractConcept" />
+    <ref role="1TJDcQ" to="tpck:gw2VY9q" resolve="BaseConcept" />
+  </node>
+  <node concept="1TIwiD" id="34Q84zM$f99">
+    <property role="EcuMT" value="3546057254280163913" />
+    <property role="TrG5h" value="ConcreteConcept" />
+    <property role="34LRSv" value="ConcreteConcept" />
+    <ref role="1TJDcQ" to="tpck:gw2VY9q" resolve="BaseConcept" />
+  </node>
+  <node concept="1TIwiD" id="34Q84zM$f9a">
+    <property role="EcuMT" value="3546057254280163914" />
+    <property role="TrG5h" value="AbstractAnnotation" />
+    <property role="R5$K7" value="true" />
+    <property role="34LRSv" value="AbstractAnnotation" />
+    <ref role="1TJDcQ" to="tpck:2ULFgo8_XDk" resolve="NodeAttribute" />
+    <node concept="M6xJ_" id="34Q84zM$f9b" role="lGtFl" />
+  </node>
+  <node concept="1TIwiD" id="34Q84zM$f9d">
+    <property role="EcuMT" value="3546057254280163917" />
+    <property role="TrG5h" value="ConcreteAnnotation" />
+    <property role="34LRSv" value="ConcreteAnnotation" />
+    <ref role="1TJDcQ" to="tpck:2ULFgo8_XDk" resolve="NodeAttribute" />
+    <node concept="M6xJ_" id="34Q84zM$f9e" role="lGtFl" />
+  </node>
+  <node concept="PlHQZ" id="34Q84zM$f9f">
+    <property role="EcuMT" value="3546057254280163919" />
+    <property role="TrG5h" value="AbstractInterface" />
+  </node>
+</model>
+
diff --git a/languages/io.lionweb.mps.converter.lang/io.lionweb.mps.converter.lang.mpl b/languages/io.lionweb.mps.converter.lang/io.lionweb.mps.converter.lang.mpl
index b9375b8..61df58e 100644
--- a/languages/io.lionweb.mps.converter.lang/io.lionweb.mps.converter.lang.mpl
+++ b/languages/io.lionweb.mps.converter.lang/io.lionweb.mps.converter.lang.mpl
@@ -24,6 +24,7 @@
     <dependency reexport="false">8865b7a8-5271-43d3-884c-6fd1d9cfdd34(MPS.OpenAPI)</dependency>
     <dependency reexport="false">6354ebe7-c22a-4a0f-ac54-50b52ab9b065(JDK)</dependency>
     <dependency reexport="false">7350a1d7-537e-4f0d-9965-e91c82522d7d(io.lionweb.mps.m3.runtime)</dependency>
+    <dependency reexport="false">3f233e7f-b8a6-46d2-a57f-795d56775243(Annotations)</dependency>
   </dependencies>
   <languageVersions>
     <language slang="l:f3061a53-9226-4cc5-a443-f952ceaf5816:jetbrains.mps.baseLanguage" version="12" />
diff --git a/languages/io.lionweb.mps.converter.lang/models/io.lionweb.mps.converter.lang.intentions.mps b/languages/io.lionweb.mps.converter.lang/models/io.lionweb.mps.converter.lang.intentions.mps
index 6da0de1..77141a0 100644
--- a/languages/io.lionweb.mps.converter.lang/models/io.lionweb.mps.converter.lang.intentions.mps
+++ b/languages/io.lionweb.mps.converter.lang/models/io.lionweb.mps.converter.lang.intentions.mps
@@ -23,6 +23,7 @@
     <import index="imb3" ref="9d6d7230-3178-4b3f-a837-7c0180c86207/java:io.lionweb.lioncore.java.language(io.lionweb.lioncore.java/)" />
     <import index="y7p" ref="r:3303ef0b-a58e-4f50-b3cb-bd3d7aaf3653(io.lionweb.mps.m3.runtime)" />
     <import index="c17a" ref="8865b7a8-5271-43d3-884c-6fd1d9cfdd34/java:org.jetbrains.mps.openapi.language(MPS.OpenAPI/)" />
+    <import index="mhfm" ref="3f233e7f-b8a6-46d2-a57f-795d56775243/java:org.jetbrains.annotations(Annotations/)" />
     <import index="wyt6" ref="6354ebe7-c22a-4a0f-ac54-50b52ab9b065/java:java.lang(JDK/)" implicit="true" />
     <import index="tpck" ref="r:00000000-0000-4000-0000-011c89590288(jetbrains.mps.lang.core.structure)" implicit="true" />
     <import index="tpcu" ref="r:00000000-0000-4000-0000-011c89590282(jetbrains.mps.lang.core.behavior)" implicit="true" />
@@ -75,6 +76,7 @@
       <concept id="1068498886296" name="jetbrains.mps.baseLanguage.structure.VariableReference" flags="nn" index="37vLTw">
         <reference id="1068581517664" name="variableDeclaration" index="3cqZAo" />
       </concept>
+      <concept id="1068498886292" name="jetbrains.mps.baseLanguage.structure.ParameterDeclaration" flags="ir" index="37vLTG" />
       <concept id="1068498886294" name="jetbrains.mps.baseLanguage.structure.AssignmentExpression" flags="nn" index="37vLTI" />
       <concept id="1225271177708" name="jetbrains.mps.baseLanguage.structure.StringType" flags="in" index="17QB3L" />
       <concept id="4972933694980447171" name="jetbrains.mps.baseLanguage.structure.BaseVariableDeclaration" flags="ng" index="19Szcq">
@@ -101,6 +103,9 @@
         <child id="1068581242865" name="localVariableDeclaration" index="3cpWs9" />
       </concept>
       <concept id="1068581242863" name="jetbrains.mps.baseLanguage.structure.LocalVariableDeclaration" flags="nr" index="3cpWsn" />
+      <concept id="1079359253375" name="jetbrains.mps.baseLanguage.structure.ParenthesizedExpression" flags="nn" index="1eOMI4">
+        <child id="1079359253376" name="expression" index="1eOMHV" />
+      </concept>
       <concept id="1204053956946" name="jetbrains.mps.baseLanguage.structure.IMethodCall" flags="ng" index="1ndlxa">
         <reference id="1068499141037" name="baseMethodDeclaration" index="37wK5l" />
         <child id="1068499141038" name="actualArgument" index="37wK5m" />
@@ -117,12 +122,18 @@
         <child id="8276990574895933173" name="catchBody" index="1zc67A" />
         <child id="8276990574895933172" name="throwable" index="1zc67B" />
       </concept>
+      <concept id="1073239437375" name="jetbrains.mps.baseLanguage.structure.NotEqualsExpression" flags="nn" index="3y3z36" />
       <concept id="5351203823916832286" name="jetbrains.mps.baseLanguage.structure.ResourceVariable" flags="ng" index="3J1hQo" />
       <concept id="5351203823916750322" name="jetbrains.mps.baseLanguage.structure.TryUniversalStatement" flags="nn" index="3J1_TO">
         <child id="8276990574886367510" name="catchClause" index="1zxBo5" />
         <child id="8276990574886367508" name="body" index="1zxBo7" />
         <child id="5351203823916750334" name="resource" index="3J1_TS" />
       </concept>
+      <concept id="1163668896201" name="jetbrains.mps.baseLanguage.structure.TernaryOperatorExpression" flags="nn" index="3K4zz7">
+        <child id="1163668914799" name="condition" index="3K4Cdx" />
+        <child id="1163668922816" name="ifTrue" index="3K4E3e" />
+        <child id="1163668934364" name="ifFalse" index="3K4GZi" />
+      </concept>
     </language>
     <language id="fd392034-7849-419d-9071-12563d152375" name="jetbrains.mps.baseLanguage.closures">
       <concept id="1199569711397" name="jetbrains.mps.baseLanguage.closures.structure.ClosureLiteral" flags="nn" index="1bVj0M">
@@ -1350,7 +1361,7 @@
                   <ref role="3uigEE" to="6peh:6jI_U5eOO9F" resolve="M1ToJson" />
                 </node>
                 <node concept="2ShNRf" id="6jI_U5ePC03" role="33vP2m">
-                  <node concept="1pGfFk" id="6jI_U5ePC04" role="2ShVmc">
+                  <node concept="1pGfFk" id="34Q84zNkc$5" role="2ShVmc">
                     <ref role="37wK5l" to="6peh:5lijfVJTSc9" resolve="M1ToJson" />
                     <node concept="2OqwBi" id="4WflrVbc6OD" role="37wK5m">
                       <node concept="2JrnkZ" id="4WflrVbc6CA" role="2Oq$k0">
@@ -1378,6 +1389,57 @@
                 </node>
               </node>
             </node>
+            <node concept="3clFbF" id="34Q84zNkcR$" role="3cqZAp">
+              <node concept="2OqwBi" id="34Q84zNkdc6" role="3clFbG">
+                <node concept="37vLTw" id="34Q84zNkcRy" role="2Oq$k0">
+                  <ref role="3cqZAo" node="6jI_U5ePC02" resolve="converter" />
+                </node>
+                <node concept="liA8E" id="34Q84zNkdo4" role="2OqNvi">
+                  <ref role="37wK5l" to="6peh:34Q84zNjWLd" resolve="setWarner" />
+                  <node concept="1bVj0M" id="34Q84zNkdqX" role="37wK5m">
+                    <node concept="37vLTG" id="34Q84zNkdG7" role="1bW2Oz">
+                      <property role="TrG5h" value="message" />
+                      <node concept="17QB3L" id="34Q84zNkdGc" role="1tU5fm" />
+                    </node>
+                    <node concept="37vLTG" id="34Q84zNkdN$" role="1bW2Oz">
+                      <property role="TrG5h" value="mps" />
+                      <node concept="3Tqbb2" id="34Q84zNketb" role="1tU5fm" />
+                    </node>
+                    <node concept="3clFbS" id="34Q84zNkdqY" role="1bW5cS">
+                      <node concept="2xdQw9" id="34Q84zMGBTf" role="3cqZAp">
+                        <property role="2xdLsb" value="gZ5fksE/warn" />
+                        <node concept="3cpWs3" id="34Q84zMGgsM" role="9lYJi">
+                          <node concept="37vLTw" id="34Q84zMGeSU" role="3uHU7B">
+                            <ref role="3cqZAo" node="34Q84zNkdG7" resolve="message" />
+                          </node>
+                          <node concept="1eOMI4" id="34Q84zMGlfD" role="3uHU7w">
+                            <node concept="3K4zz7" id="34Q84zMGicd" role="1eOMHV">
+                              <node concept="2OqwBi" id="34Q84zMGjbk" role="3K4E3e">
+                                <node concept="37vLTw" id="34Q84zMGiRH" role="2Oq$k0">
+                                  <ref role="3cqZAo" node="34Q84zNkdN$" resolve="mps" />
+                                </node>
+                                <node concept="2qgKlT" id="34Q84zNkeC3" role="2OqNvi">
+                                  <ref role="37wK5l" to="tpcu:hEwIMiw" resolve="getPresentation" />
+                                </node>
+                              </node>
+                              <node concept="Xl_RD" id="34Q84zMGjVe" role="3K4GZi">
+                                <property role="Xl_RC" value="" />
+                              </node>
+                              <node concept="3y3z36" id="34Q84zMGhfN" role="3K4Cdx">
+                                <node concept="10Nm6u" id="34Q84zMGhwH" role="3uHU7w" />
+                                <node concept="37vLTw" id="34Q84zMGgO2" role="3uHU7B">
+                                  <ref role="3cqZAo" node="34Q84zNkdN$" resolve="mps" />
+                                </node>
+                              </node>
+                            </node>
+                          </node>
+                        </node>
+                      </node>
+                    </node>
+                  </node>
+                </node>
+              </node>
+            </node>
             <node concept="3cpWs8" id="39$JcGF9QSP" role="3cqZAp">
               <node concept="3cpWsn" id="39$JcGF9QSQ" role="3cpWs9">
                 <property role="TrG5h" value="scope" />
diff --git a/solutions/io.lionweb.mps.build/models/io.lionweb.mps.build.mps b/solutions/io.lionweb.mps.build/models/io.lionweb.mps.build.mps
index f07e145..29f9b6e 100644
--- a/solutions/io.lionweb.mps.build/models/io.lionweb.mps.build.mps
+++ b/solutions/io.lionweb.mps.build/models/io.lionweb.mps.build.mps
@@ -1126,6 +1126,11 @@
             <ref role="3bR37D" node="6jI_U5e9kIC" resolve="io.lionweb.mps.m3.runtime" />
           </node>
         </node>
+        <node concept="1SiIV0" id="34Q84zMMDxU" role="3bR37C">
+          <node concept="3bR9La" id="34Q84zMMDxV" role="1SiIV1">
+            <ref role="3bR37D" to="ffeo:44LXwdzyvTi" resolve="Annotations" />
+          </node>
+        </node>
       </node>
       <node concept="1E1JtA" id="5wsogBcGDNb" role="2G$12L">
         <property role="BnDLt" value="true" />
@@ -3333,6 +3338,61 @@
           </node>
         </node>
       </node>
+      <node concept="1E1JtD" id="34Q84zMMDhU" role="2G$12L">
+        <property role="BnDLt" value="true" />
+        <property role="TrG5h" value="io.lionweb.mps.converter.TestAbstract" />
+        <property role="3LESm3" value="3ecd737b-418b-4a70-a991-f6b83f0e3247" />
+        <node concept="398BVA" id="34Q84zMMDrC" role="3LF7KH">
+          <ref role="398BVh" node="5wsogBcGDKe" resolve="lionweb-mps.home" />
+          <node concept="2Ry0Ak" id="34Q84zMMDsr" role="iGT6I">
+            <property role="2Ry0Am" value="languages" />
+            <node concept="2Ry0Ak" id="34Q84zMMDtU" role="2Ry0An">
+              <property role="2Ry0Am" value="io.lionweb.mps.converter.TestAbstract" />
+              <node concept="2Ry0Ak" id="34Q84zMMDvp" role="2Ry0An">
+                <property role="2Ry0Am" value="io.lionweb.mps.converter.TestAbstract.mpl" />
+              </node>
+            </node>
+          </node>
+        </node>
+        <node concept="1BupzO" id="34Q84zMMDCA" role="3bR31x">
+          <property role="3ZfqAx" value="models" />
+          <property role="1Hdu6h" value="true" />
+          <property role="1HemKv" value="true" />
+          <node concept="3LXTmp" id="34Q84zMMDCB" role="1HemKq">
+            <node concept="398BVA" id="34Q84zMMDCq" role="3LXTmr">
+              <ref role="398BVh" node="5wsogBcGDKe" resolve="lionweb-mps.home" />
+              <node concept="2Ry0Ak" id="34Q84zMMDCr" role="iGT6I">
+                <property role="2Ry0Am" value="languages" />
+                <node concept="2Ry0Ak" id="34Q84zMMDCs" role="2Ry0An">
+                  <property role="2Ry0Am" value="io.lionweb.mps.converter.TestAbstract" />
+                  <node concept="2Ry0Ak" id="34Q84zMMDCt" role="2Ry0An">
+                    <property role="2Ry0Am" value="models" />
+                  </node>
+                </node>
+              </node>
+            </node>
+            <node concept="3qWCbU" id="34Q84zMMDCC" role="3LXTna">
+              <property role="3qWCbO" value="**/*.mps, **/*.mpsr, **/.model" />
+            </node>
+          </node>
+        </node>
+        <node concept="3rtmxn" id="34Q84zMMDFK" role="3bR31x">
+          <node concept="3LXTmp" id="34Q84zMMDFL" role="3rtmxm">
+            <node concept="398BVA" id="34Q84zMMDFM" role="3LXTmr">
+              <ref role="398BVh" node="5wsogBcGDKe" resolve="lionweb-mps.home" />
+              <node concept="2Ry0Ak" id="34Q84zMMDFN" role="iGT6I">
+                <property role="2Ry0Am" value="languages" />
+                <node concept="2Ry0Ak" id="34Q84zMMDFO" role="2Ry0An">
+                  <property role="2Ry0Am" value="io.lionweb.mps.converter.TestAbstract" />
+                </node>
+              </node>
+            </node>
+            <node concept="3qWCbU" id="34Q84zMMDFQ" role="3LXTna">
+              <property role="3qWCbO" value="icons/**" />
+            </node>
+          </node>
+        </node>
+      </node>
       <node concept="1E1JtA" id="3RxvfZghCzp" role="2G$12L">
         <property role="BnDLt" value="true" />
         <property role="TrG5h" value="io.lionweb.mps.converter.test.support" />
@@ -3675,6 +3735,16 @@
           <ref role="3bR37D" node="jyNOuY9kJq" resolve="io.lionweb.mps.converter.TestRefs" />
         </node>
       </node>
+      <node concept="1SiIV0" id="34Q84zMMDDp" role="3bR37C">
+        <node concept="3bR9La" id="34Q84zMMDDq" role="1SiIV1">
+          <ref role="3bR37D" to="ffeo:44LXwdzyvTi" resolve="Annotations" />
+        </node>
+      </node>
+      <node concept="1SiIV0" id="34Q84zMMDQ6" role="3bR37C">
+        <node concept="3bR9La" id="34Q84zMMDQ7" role="1SiIV1">
+          <ref role="3bR37D" node="34Q84zMMDhU" resolve="io.lionweb.mps.converter.TestAbstract" />
+        </node>
+      </node>
     </node>
     <node concept="1E1JtA" id="2_4dqAZFOPK" role="3989C9">
       <property role="BnDLt" value="true" />
diff --git a/solutions/io.lionweb.mps.json.test/io.lionweb.mps.json.test.msd b/solutions/io.lionweb.mps.json.test/io.lionweb.mps.json.test.msd
index f9d0478..5da2b13 100644
--- a/solutions/io.lionweb.mps.json.test/io.lionweb.mps.json.test.msd
+++ b/solutions/io.lionweb.mps.json.test/io.lionweb.mps.json.test.msd
@@ -31,9 +31,12 @@
     <dependency reexport="false">48d0f6eb-6186-4cec-83d1-7caedb05a494(io.lionweb.mps.converter.TestLang2)</dependency>
     <dependency reexport="false">1f02557f-ee3b-4ebc-bcea-ff6ec30a2c3e(io.lionweb.mps.converter.test.support)</dependency>
     <dependency reexport="false">cc1efc53-7b9a-40a1-9c9b-06659e6a6116(io.lionweb.mps.json.test.support)</dependency>
+    <dependency reexport="false">3ecd737b-418b-4a70-a991-f6b83f0e3247(io.lionweb.mps.converter.TestAbstract)</dependency>
+    <dependency reexport="false">3f233e7f-b8a6-46d2-a57f-795d56775243(Annotations)</dependency>
   </dependencies>
   <languageVersions>
     <language slang="l:76d927fd-3a5a-4e40-865b-7c2d329ca675:MultiRefLang" version="1" />
+    <language slang="l:3ecd737b-418b-4a70-a991-f6b83f0e3247:io.lionweb.mps.converter.TestAbstract" version="0" />
     <language slang="l:afd6d8a2-5e3b-49d1-ab82-c9cb7dc063bb:io.lionweb.mps.converter.TestAnnotation" version="0" />
     <language slang="l:11541b24-a02a-4586-a931-92521b3f6166:io.lionweb.mps.converter.TestCustomDatatype" version="0" />
     <language slang="l:08caad75-8246-4427-bb4d-8444b6c5c729:io.lionweb.mps.converter.TestLang" version="0" />
@@ -65,6 +68,7 @@
     <module reference="76d927fd-3a5a-4e40-865b-7c2d329ca675(MultiRefLang)" version="0" />
     <module reference="9d6d7230-3178-4b3f-a837-7c0180c86207(io.lionweb.lionweb.java)" version="0" />
     <module reference="4d96f781-5fa4-4d94-817a-c51f74fdf43f(io.lionweb.mps.converter)" version="0" />
+    <module reference="3ecd737b-418b-4a70-a991-f6b83f0e3247(io.lionweb.mps.converter.TestAbstract)" version="0" />
     <module reference="08caad75-8246-4427-bb4d-8444b6c5c729(io.lionweb.mps.converter.TestLang)" version="0" />
     <module reference="48d0f6eb-6186-4cec-83d1-7caedb05a494(io.lionweb.mps.converter.TestLang2)" version="0" />
     <module reference="099490a3-1e39-4ed1-bebc-8027665cecf9(io.lionweb.mps.converter.TestLang3)" version="0" />
diff --git a/solutions/io.lionweb.mps.json.test/models/io.lionweb.mps.json.test.json2lionweb@tests.mps b/solutions/io.lionweb.mps.json.test/models/io.lionweb.mps.json.test.json2lionweb@tests.mps
index 42df1d3..2350ae6 100644
--- a/solutions/io.lionweb.mps.json.test/models/io.lionweb.mps.json.test.json2lionweb@tests.mps
+++ b/solutions/io.lionweb.mps.json.test/models/io.lionweb.mps.json.test.json2lionweb@tests.mps
@@ -16,6 +16,7 @@
     <use id="afd6d8a2-5e3b-49d1-ab82-c9cb7dc063bb" name="io.lionweb.mps.converter.TestAnnotation" version="0" />
     <use id="a95063a5-27eb-4ae8-894e-ea20f8b3d6a2" name="io.lionweb.mps.converter.TestRefs" version="0" />
     <use id="08caad75-8246-4427-bb4d-8444b6c5c729" name="io.lionweb.mps.converter.TestLang" version="0" />
+    <use id="3ecd737b-418b-4a70-a991-f6b83f0e3247" name="io.lionweb.mps.converter.TestAbstract" version="0" />
   </languages>
   <imports>
     <import index="mhbf" ref="8865b7a8-5271-43d3-884c-6fd1d9cfdd34/java:org.jetbrains.mps.openapi.model(MPS.OpenAPI/)" />
@@ -33,7 +34,12 @@
     <import index="e8bb" ref="6ed54515-acc8-4d1e-a16c-9fd6cfe951ea/java:jetbrains.mps.smodel.adapter.ids(MPS.Core/)" />
     <import index="zf9n" ref="r:33291a1d-c068-4dee-af5a-78a18bef2859(io.lionweb.mps.converter.TestLang2.structure)" />
     <import index="kte7" ref="r:2b2fbaa9-e628-460c-aea7-59a3006590c9(io.lionweb.mps.json.test.support)" />
+    <import index="nnlr" ref="r:a08e442f-c741-4fbc-a54c-eca0c8e3790c(io.lionweb.mps.converter.TestAbstract.structure)" />
+    <import index="mhfm" ref="3f233e7f-b8a6-46d2-a57f-795d56775243/java:org.jetbrains.annotations(Annotations/)" />
+    <import index="i5cy" ref="6354ebe7-c22a-4a0f-ac54-50b52ab9b065/java:java.util.concurrent.atomic(JDK/)" />
+    <import index="82uw" ref="6354ebe7-c22a-4a0f-ac54-50b52ab9b065/java:java.util.function(JDK/)" />
     <import index="wyt6" ref="6354ebe7-c22a-4a0f-ac54-50b52ab9b065/java:java.lang(JDK/)" implicit="true" />
+    <import index="guwi" ref="6354ebe7-c22a-4a0f-ac54-50b52ab9b065/java:java.io(JDK/)" implicit="true" />
   </imports>
   <registry>
     <language id="8585453e-6bfb-4d80-98de-b16074f1d86c" name="jetbrains.mps.lang.test">
@@ -110,6 +116,9 @@
       <concept id="1081236700937" name="jetbrains.mps.baseLanguage.structure.StaticMethodCall" flags="nn" index="2YIFZM">
         <reference id="1144433194310" name="classConcept" index="1Pybhc" />
       </concept>
+      <concept id="1070533707846" name="jetbrains.mps.baseLanguage.structure.StaticFieldReference" flags="nn" index="10M0yZ">
+        <reference id="1144433057691" name="classifier" index="1PxDUh" />
+      </concept>
       <concept id="1070534058343" name="jetbrains.mps.baseLanguage.structure.NullLiteral" flags="nn" index="10Nm6u" />
       <concept id="1070534370425" name="jetbrains.mps.baseLanguage.structure.IntegerType" flags="in" index="10Oyi0" />
       <concept id="1070534644030" name="jetbrains.mps.baseLanguage.structure.BooleanType" flags="in" index="10P_77" />
@@ -118,6 +127,7 @@
         <child id="1070534934092" name="expression" index="10QFUP" />
       </concept>
       <concept id="1068431474542" name="jetbrains.mps.baseLanguage.structure.VariableDeclaration" flags="ng" index="33uBYm">
+        <property id="1176718929932" name="isFinal" index="3TUv4t" />
         <child id="1068431790190" name="initializer" index="33vP2m" />
       </concept>
       <concept id="1068498886296" name="jetbrains.mps.baseLanguage.structure.VariableReference" flags="nn" index="37vLTw">
@@ -173,6 +183,7 @@
       <concept id="1212685548494" name="jetbrains.mps.baseLanguage.structure.ClassCreator" flags="nn" index="1pGfFk" />
       <concept id="1107535904670" name="jetbrains.mps.baseLanguage.structure.ClassifierType" flags="in" index="3uibUv">
         <reference id="1107535924139" name="classifier" index="3uigEE" />
+        <child id="1109201940907" name="parameter" index="11_B2D" />
       </concept>
       <concept id="1081773326031" name="jetbrains.mps.baseLanguage.structure.BinaryOperation" flags="nn" index="3uHJSO">
         <child id="1081773367579" name="rightExpression" index="3uHU7w" />
@@ -328,6 +339,9 @@
         <child id="8427750732757990724" name="expected" index="3tpDZB" />
       </concept>
       <concept id="1171978097730" name="jetbrains.mps.baseLanguage.unitTest.structure.AssertEquals" flags="nn" index="3vlDli" />
+      <concept id="1171981022339" name="jetbrains.mps.baseLanguage.unitTest.structure.AssertTrue" flags="nn" index="3vwNmj">
+        <child id="1171981057159" name="condition" index="3vwVQn" />
+      </concept>
       <concept id="1172028177041" name="jetbrains.mps.baseLanguage.unitTest.structure.AssertIsNull" flags="nn" index="3ykFI1">
         <child id="1172028236559" name="expression" index="3ykU8v" />
       </concept>
@@ -405,6 +419,15 @@
         <property id="2423417345669755629" name="filter" index="1eyWvh" />
       </concept>
     </language>
+    <language id="3ecd737b-418b-4a70-a991-f6b83f0e3247" name="io.lionweb.mps.converter.TestAbstract">
+      <concept id="3546057254280163386" name="io.lionweb.mps.converter.TestAbstract.structure.AbstractPartition" flags="ng" index="33DH1M" />
+      <concept id="3546057254280163913" name="io.lionweb.mps.converter.TestAbstract.structure.ConcreteConcept" flags="ng" index="33DH81" />
+      <concept id="3546057254280163914" name="io.lionweb.mps.converter.TestAbstract.structure.AbstractAnnotation" flags="ng" index="33DH82" />
+      <concept id="3546057254280163917" name="io.lionweb.mps.converter.TestAbstract.structure.ConcreteAnnotation" flags="ng" index="33DH85" />
+      <concept id="3546057254280163919" name="io.lionweb.mps.converter.TestAbstract.structure.AbstractInterface" flags="ng" index="33DH87" />
+      <concept id="3546057254280163909" name="io.lionweb.mps.converter.TestAbstract.structure.ConcretePartition" flags="ng" index="33DH8d" />
+      <concept id="3546057254280163911" name="io.lionweb.mps.converter.TestAbstract.structure.AbstractConcept" flags="ng" index="33DH8f" />
+    </language>
     <language id="48d0f6eb-6186-4cec-83d1-7caedb05a494" name="io.lionweb.mps.converter.TestLang2">
       <concept id="5605122842158780280" name="io.lionweb.mps.converter.TestLang2.structure.Test2ConceptUnkeyed" flags="ng" index="1kx2G0">
         <property id="5605122842163857069" name="propKeyed" index="1kkUcG" />
@@ -8365,5 +8388,1208 @@
       </node>
     </node>
   </node>
+  <node concept="1lH9Xt" id="34Q84zM$dO8">
+    <property role="TrG5h" value="exportAbstractInstances" />
+    <node concept="2XrIbr" id="34Q84zNkgiK" role="1qtyYc">
+      <property role="TrG5h" value="expectNoWarning" />
+      <node concept="3uibUv" id="34Q84zNkgU2" role="3clF45">
+        <ref role="3uigEE" to="82uw:~BiConsumer" resolve="BiConsumer" />
+        <node concept="17QB3L" id="34Q84zNkgUH" role="11_B2D" />
+        <node concept="3uibUv" id="34Q84zNkgVq" role="11_B2D">
+          <ref role="3uigEE" to="mhbf:~SNode" resolve="SNode" />
+        </node>
+      </node>
+      <node concept="3clFbS" id="34Q84zNkgiM" role="3clF47">
+        <node concept="3clFbF" id="34Q84zNkiPq" role="3cqZAp">
+          <node concept="1bVj0M" id="34Q84zNkhUf" role="3clFbG">
+            <node concept="37vLTG" id="34Q84zNkhUg" role="1bW2Oz">
+              <property role="TrG5h" value="message" />
+              <node concept="17QB3L" id="34Q84zNkhUh" role="1tU5fm" />
+            </node>
+            <node concept="37vLTG" id="34Q84zNkhUi" role="1bW2Oz">
+              <property role="TrG5h" value="node" />
+              <node concept="3uibUv" id="34Q84zNkhUj" role="1tU5fm">
+                <ref role="3uigEE" to="mhbf:~SNode" resolve="SNode" />
+              </node>
+            </node>
+            <node concept="3clFbS" id="34Q84zNkhUk" role="1bW5cS">
+              <node concept="3vwNmj" id="34Q84zNkhUl" role="3cqZAp">
+                <node concept="3clFbT" id="34Q84zNkhUm" role="3vwVQn" />
+                <node concept="3_1$Yv" id="34Q84zNkhUn" role="3_9lra">
+                  <node concept="Xl_RD" id="34Q84zNkhUo" role="3_1BAH">
+                    <property role="Xl_RC" value="Got unexpected warning" />
+                  </node>
+                </node>
+              </node>
+            </node>
+          </node>
+        </node>
+      </node>
+      <node concept="3Tm6S6" id="34Q84zNkgTa" role="1B3o_S" />
+    </node>
+    <node concept="2XrIbr" id="34Q84zNkiUe" role="1qtyYc">
+      <property role="TrG5h" value="incrementWarning" />
+      <node concept="3uibUv" id="34Q84zNkiUf" role="3clF45">
+        <ref role="3uigEE" to="82uw:~BiConsumer" resolve="BiConsumer" />
+        <node concept="17QB3L" id="34Q84zNkiUg" role="11_B2D" />
+        <node concept="3uibUv" id="34Q84zNkiUh" role="11_B2D">
+          <ref role="3uigEE" to="mhbf:~SNode" resolve="SNode" />
+        </node>
+      </node>
+      <node concept="3clFbS" id="34Q84zNkiUi" role="3clF47">
+        <node concept="3clFbF" id="34Q84zNkiUj" role="3cqZAp">
+          <node concept="1bVj0M" id="34Q84zNkiUk" role="3clFbG">
+            <node concept="37vLTG" id="34Q84zNkiUl" role="1bW2Oz">
+              <property role="TrG5h" value="message" />
+              <node concept="17QB3L" id="34Q84zNkiUm" role="1tU5fm" />
+            </node>
+            <node concept="37vLTG" id="34Q84zNkiUn" role="1bW2Oz">
+              <property role="TrG5h" value="node" />
+              <node concept="3uibUv" id="34Q84zNkiUo" role="1tU5fm">
+                <ref role="3uigEE" to="mhbf:~SNode" resolve="SNode" />
+              </node>
+            </node>
+            <node concept="3clFbS" id="34Q84zNkiUp" role="1bW5cS">
+              <node concept="3clFbF" id="34Q84zNkkik" role="3cqZAp">
+                <node concept="2OqwBi" id="34Q84zNkkih" role="3clFbG">
+                  <node concept="10M0yZ" id="34Q84zNkkii" role="2Oq$k0">
+                    <ref role="1PxDUh" to="wyt6:~System" resolve="System" />
+                    <ref role="3cqZAo" to="wyt6:~System.err" resolve="err" />
+                  </node>
+                  <node concept="liA8E" id="34Q84zNkkij" role="2OqNvi">
+                    <ref role="37wK5l" to="guwi:~PrintStream.println(java.lang.String)" resolve="println" />
+                    <node concept="3cpWs3" id="34Q84zNkkUT" role="37wK5m">
+                      <node concept="37vLTw" id="34Q84zNkkZt" role="3uHU7w">
+                        <ref role="3cqZAo" node="34Q84zNkiUn" resolve="node" />
+                      </node>
+                      <node concept="37vLTw" id="34Q84zNkkkC" role="3uHU7B">
+                        <ref role="3cqZAo" node="34Q84zNkiUl" resolve="message" />
+                      </node>
+                    </node>
+                  </node>
+                </node>
+              </node>
+              <node concept="3clFbF" id="34Q84zNkkb8" role="3cqZAp">
+                <node concept="2OqwBi" id="34Q84zNkkb9" role="3clFbG">
+                  <node concept="37vLTw" id="34Q84zNkkba" role="2Oq$k0">
+                    <ref role="3cqZAo" node="34Q84zNkjAt" resolve="warnCount" />
+                  </node>
+                  <node concept="liA8E" id="34Q84zNkkbb" role="2OqNvi">
+                    <ref role="37wK5l" to="i5cy:~AtomicInteger.incrementAndGet()" resolve="incrementAndGet" />
+                  </node>
+                </node>
+              </node>
+            </node>
+          </node>
+        </node>
+      </node>
+      <node concept="3Tm6S6" id="34Q84zNkiUu" role="1B3o_S" />
+      <node concept="37vLTG" id="34Q84zNkjAt" role="3clF46">
+        <property role="TrG5h" value="warnCount" />
+        <node concept="3uibUv" id="34Q84zNkjAs" role="1tU5fm">
+          <ref role="3uigEE" to="i5cy:~AtomicInteger" resolve="AtomicInteger" />
+        </node>
+      </node>
+    </node>
+    <node concept="1qefOq" id="34Q84zM$dO9" role="1SKRRt">
+      <node concept="33DH8d" id="34Q84zM$hyk" role="1qenE9">
+        <node concept="3xLA65" id="34Q84zM$D92" role="lGtFl">
+          <property role="TrG5h" value="concretePartition" />
+        </node>
+      </node>
+    </node>
+    <node concept="1qefOq" id="34Q84zM$hym" role="1SKRRt">
+      <node concept="33DH81" id="34Q84zM$h_v" role="1qenE9">
+        <node concept="3xLA65" id="34Q84zM$D94" role="lGtFl">
+          <property role="TrG5h" value="concreteConcept" />
+        </node>
+      </node>
+    </node>
+    <node concept="1qefOq" id="34Q84zM$h_x" role="1SKRRt">
+      <node concept="33DH85" id="34Q84zM$hCG" role="1qenE9">
+        <node concept="3xLA65" id="34Q84zM$D96" role="lGtFl">
+          <property role="TrG5h" value="concreteAnnotation" />
+        </node>
+      </node>
+    </node>
+    <node concept="1qefOq" id="34Q84zM$hKL" role="1SKRRt">
+      <node concept="15s5l7" id="34Q84zM$D8S" role="lGtFl">
+        <property role="1eyWvh" value="FLAVOUR_ISSUE_KIND=&quot;typesystem (typesystem)&quot;;FLAVOUR_MESSAGE=&quot;Error: Abstract concept instance detected. Use one of sub-concepts instead. Concept: AbstractPartition&quot;;FLAVOUR_RULE_ID=&quot;[r:cec599e3-51d2-48a7-af31-989e3cbd593c(jetbrains.mps.lang.core.typesystem)/7283836008113027554]&quot;;" />
+        <property role="huDt6" value="Error: Abstract concept instance detected. Use one of sub-concepts instead. Concept: AbstractPartition" />
+      </node>
+      <node concept="33DH1M" id="34Q84zM$jUI" role="1qenE9">
+        <node concept="3xLA65" id="34Q84zM$D98" role="lGtFl">
+          <property role="TrG5h" value="abstractPartition" />
+        </node>
+      </node>
+    </node>
+    <node concept="1qefOq" id="34Q84zM$hKJ" role="1SKRRt">
+      <node concept="15s5l7" id="34Q84zM$D8U" role="lGtFl">
+        <property role="1eyWvh" value="FLAVOUR_ISSUE_KIND=&quot;typesystem (typesystem)&quot;;FLAVOUR_MESSAGE=&quot;Error: Abstract concept instance detected. Use one of sub-concepts instead. Concept: AbstractConcept&quot;;FLAVOUR_RULE_ID=&quot;[r:cec599e3-51d2-48a7-af31-989e3cbd593c(jetbrains.mps.lang.core.typesystem)/7283836008113027554]&quot;;" />
+        <property role="huDt6" value="Error: Abstract concept instance detected. Use one of sub-concepts instead. Concept: AbstractConcept" />
+      </node>
+      <node concept="33DH8f" id="34Q84zM$l4I" role="1qenE9">
+        <node concept="3xLA65" id="34Q84zM$D9a" role="lGtFl">
+          <property role="TrG5h" value="abstractConcept" />
+        </node>
+      </node>
+    </node>
+    <node concept="1qefOq" id="34Q84zM$hKH" role="1SKRRt">
+      <node concept="15s5l7" id="34Q84zM$D8W" role="lGtFl">
+        <property role="1eyWvh" value="FLAVOUR_ISSUE_KIND=&quot;typesystem (typesystem)&quot;;FLAVOUR_MESSAGE=&quot;Error: Abstract concept instance detected. Use one of sub-concepts instead. Concept: AbstractAnnotation&quot;;FLAVOUR_RULE_ID=&quot;[r:cec599e3-51d2-48a7-af31-989e3cbd593c(jetbrains.mps.lang.core.typesystem)/7283836008113027554]&quot;;" />
+        <property role="huDt6" value="Error: Abstract concept instance detected. Use one of sub-concepts instead. Concept: AbstractAnnotation" />
+      </node>
+      <node concept="33DH82" id="34Q84zM$mgY" role="1qenE9">
+        <node concept="3xLA65" id="34Q84zM$D9c" role="lGtFl">
+          <property role="TrG5h" value="abstractAnnotation" />
+        </node>
+      </node>
+    </node>
+    <node concept="1qefOq" id="34Q84zM$mI2" role="1SKRRt">
+      <node concept="33DH81" id="34Q84zM$mI3" role="1qenE9">
+        <node concept="33DH85" id="34Q84zM$rbI" role="lGtFl" />
+        <node concept="3xLA65" id="34Q84zM$D9e" role="lGtFl">
+          <property role="TrG5h" value="annotatedConcrete" />
+        </node>
+      </node>
+    </node>
+    <node concept="1qefOq" id="34Q84zM$r_u" role="1SKRRt">
+      <node concept="15s5l7" id="34Q84zM$D8Y" role="lGtFl">
+        <property role="1eyWvh" value="FLAVOUR_ISSUE_KIND=&quot;typesystem (typesystem)&quot;;FLAVOUR_MESSAGE=&quot;Error: Abstract concept instance detected. Use one of sub-concepts instead. Concept: AbstractAnnotation&quot;;FLAVOUR_RULE_ID=&quot;[r:cec599e3-51d2-48a7-af31-989e3cbd593c(jetbrains.mps.lang.core.typesystem)/7283836008113027554]&quot;;" />
+        <property role="huDt6" value="Error: Abstract concept instance detected. Use one of sub-concepts instead. Concept: AbstractAnnotation" />
+      </node>
+      <node concept="33DH81" id="34Q84zM$rCO" role="1qenE9">
+        <node concept="33DH82" id="34Q84zM$w3S" role="lGtFl" />
+        <node concept="3xLA65" id="34Q84zM$D9h" role="lGtFl">
+          <property role="TrG5h" value="annotatedAbstract" />
+        </node>
+      </node>
+    </node>
+    <node concept="1qefOq" id="34Q84zM$wtC" role="1SKRRt">
+      <node concept="15s5l7" id="34Q84zM$D90" role="lGtFl">
+        <property role="1eyWvh" value="FLAVOUR_ISSUE_KIND=&quot;typesystem (typesystem)&quot;;FLAVOUR_MESSAGE=&quot;Error: Abstract concept instance detected. Use one of sub-concepts instead. Concept: AbstractInterface&quot;;FLAVOUR_RULE_ID=&quot;[r:cec599e3-51d2-48a7-af31-989e3cbd593c(jetbrains.mps.lang.core.typesystem)/7283836008113027554]&quot;;" />
+        <property role="huDt6" value="Error: Abstract concept instance detected. Use one of sub-concepts instead. Concept: AbstractInterface" />
+      </node>
+      <node concept="33DH87" id="34Q84zM$yvT" role="1qenE9">
+        <node concept="3xLA65" id="34Q84zM$D9k" role="lGtFl">
+          <property role="TrG5h" value="abstractInterface" />
+        </node>
+      </node>
+    </node>
+    <node concept="1LZb2c" id="34Q84zM$dOi" role="1SL9yI">
+      <property role="TrG5h" value="concretePartition" />
+      <node concept="3cqZAl" id="34Q84zM$dOj" role="3clF45" />
+      <node concept="3clFbS" id="34Q84zM$dOk" role="3clF47">
+        <node concept="3cpWs8" id="34Q84zM$F$i" role="3cqZAp">
+          <node concept="3cpWsn" id="34Q84zM$F$j" role="3cpWs9">
+            <property role="TrG5h" value="input" />
+            <node concept="3Tqbb2" id="34Q84zM$Exi" role="1tU5fm">
+              <ref role="ehGHo" to="nnlr:34Q84zM$f95" resolve="ConcretePartition" />
+            </node>
+            <node concept="3xONca" id="34Q84zM$F$k" role="33vP2m">
+              <ref role="3xOPvv" node="34Q84zM$D92" resolve="concretePartition" />
+            </node>
+          </node>
+        </node>
+        <node concept="3clFbH" id="34Q84zM$FHu" role="3cqZAp" />
+        <node concept="3clFbF" id="34Q84zM$E0J" role="3cqZAp">
+          <node concept="2OqwBi" id="34Q84zM$EjT" role="3clFbG">
+            <node concept="37vLTw" id="34Q84zM$F$l" role="2Oq$k0">
+              <ref role="3cqZAo" node="34Q84zM$F$j" resolve="input" />
+            </node>
+            <node concept="3YRAZt" id="34Q84zM$EOm" role="2OqNvi" />
+          </node>
+        </node>
+        <node concept="3cpWs8" id="34Q84zM$dOq" role="3cqZAp">
+          <node concept="3cpWsn" id="34Q84zM$dOr" role="3cpWs9">
+            <property role="TrG5h" value="converter" />
+            <node concept="3uibUv" id="34Q84zM$dOs" role="1tU5fm">
+              <ref role="3uigEE" to="6peh:6jI_U5eOO9F" resolve="M1ToJson" />
+            </node>
+            <node concept="2ShNRf" id="34Q84zM$dOt" role="33vP2m">
+              <node concept="1pGfFk" id="34Q84zNkfDQ" role="2ShVmc">
+                <ref role="37wK5l" to="6peh:5lijfVJTSc9" resolve="M1ToJson" />
+                <node concept="2OqwBi" id="34Q84zM$dOv" role="37wK5m">
+                  <node concept="1jGwE1" id="34Q84zM$dOw" role="2Oq$k0" />
+                  <node concept="liA8E" id="34Q84zM$dOx" role="2OqNvi">
+                    <ref role="37wK5l" to="mhbf:~SModel.getRepository()" resolve="getRepository" />
+                  </node>
+                </node>
+                <node concept="2ShNRf" id="34Q84zM$dOy" role="37wK5m">
+                  <node concept="2HTt$P" id="34Q84zM$dOz" role="2ShVmc">
+                    <node concept="3uibUv" id="34Q84zM$dO$" role="2HTBi0">
+                      <ref role="3uigEE" to="mhbf:~SNode" resolve="SNode" />
+                    </node>
+                    <node concept="37vLTw" id="34Q84zM$F$m" role="2HTEbv">
+                      <ref role="3cqZAo" node="34Q84zM$F$j" resolve="input" />
+                    </node>
+                  </node>
+                </node>
+              </node>
+            </node>
+          </node>
+        </node>
+        <node concept="3clFbF" id="34Q84zNklUS" role="3cqZAp">
+          <node concept="2OqwBi" id="34Q84zNkmyA" role="3clFbG">
+            <node concept="37vLTw" id="34Q84zNklUQ" role="2Oq$k0">
+              <ref role="3cqZAo" node="34Q84zM$dOr" resolve="converter" />
+            </node>
+            <node concept="liA8E" id="34Q84zNknhf" role="2OqNvi">
+              <ref role="37wK5l" to="6peh:34Q84zNjWLd" resolve="setWarner" />
+              <node concept="2OqwBi" id="34Q84zNknEW" role="37wK5m">
+                <node concept="2WthIp" id="34Q84zNknEZ" role="2Oq$k0" />
+                <node concept="2XshWL" id="34Q84zNknF1" role="2OqNvi">
+                  <ref role="2WH_rO" node="34Q84zNkgiK" resolve="expectNoWarning" />
+                </node>
+              </node>
+            </node>
+          </node>
+        </node>
+        <node concept="3vlDli" id="34Q84zM$dOK" role="3cqZAp">
+          <node concept="3cmrfG" id="34Q84zM$dOL" role="3tpDZB">
+            <property role="3cmrfH" value="1" />
+          </node>
+          <node concept="2OqwBi" id="34Q84zM$dOM" role="3tpDZA">
+            <node concept="1eOMI4" id="34Q84zM$FQ_" role="2Oq$k0">
+              <node concept="2OqwBi" id="34Q84zM$FQv" role="1eOMHV">
+                <node concept="2OqwBi" id="34Q84zM$FQw" role="2Oq$k0">
+                  <node concept="37vLTw" id="34Q84zM$FQx" role="2Oq$k0">
+                    <ref role="3cqZAo" node="34Q84zM$dOr" resolve="converter" />
+                  </node>
+                  <node concept="liA8E" id="34Q84zM$FQy" role="2OqNvi">
+                    <ref role="37wK5l" to="6peh:6jI_U5eOR8U" resolve="convert" />
+                    <node concept="Rm8GO" id="34Q84zM$FQz" role="37wK5m">
+                      <ref role="1Px2BO" to="6peh:6jI_U5eOQFV" resolve="M1ToJson.Scope" />
+                      <ref role="Rm8GQ" to="6peh:6jI_U5eOQOm" resolve="closure" />
+                    </node>
+                  </node>
+                </node>
+                <node concept="ANE8D" id="34Q84zM$FQ$" role="2OqNvi" />
+              </node>
+            </node>
+            <node concept="34oBXx" id="34Q84zM$dOO" role="2OqNvi" />
+          </node>
+        </node>
+      </node>
+    </node>
+    <node concept="1LZb2c" id="34Q84zM_cgq" role="1SL9yI">
+      <property role="TrG5h" value="concreteConcept" />
+      <node concept="3cqZAl" id="34Q84zM_cgr" role="3clF45" />
+      <node concept="3clFbS" id="34Q84zM_cgs" role="3clF47">
+        <node concept="3cpWs8" id="34Q84zM_cgt" role="3cqZAp">
+          <node concept="3cpWsn" id="34Q84zM_cgu" role="3cpWs9">
+            <property role="TrG5h" value="input" />
+            <node concept="3Tqbb2" id="34Q84zM_cgv" role="1tU5fm">
+              <ref role="ehGHo" to="nnlr:34Q84zM$f99" resolve="ConcreteConcept" />
+            </node>
+            <node concept="3xONca" id="34Q84zM_cgw" role="33vP2m">
+              <ref role="3xOPvv" node="34Q84zM$D94" resolve="concreteConcept" />
+            </node>
+          </node>
+        </node>
+        <node concept="3clFbH" id="34Q84zM_cgx" role="3cqZAp" />
+        <node concept="3clFbF" id="34Q84zM_cgy" role="3cqZAp">
+          <node concept="2OqwBi" id="34Q84zM_cgz" role="3clFbG">
+            <node concept="37vLTw" id="34Q84zM_cg$" role="2Oq$k0">
+              <ref role="3cqZAo" node="34Q84zM_cgu" resolve="input" />
+            </node>
+            <node concept="3YRAZt" id="34Q84zM_cg_" role="2OqNvi" />
+          </node>
+        </node>
+        <node concept="3cpWs8" id="34Q84zM_cgA" role="3cqZAp">
+          <node concept="3cpWsn" id="34Q84zM_cgB" role="3cpWs9">
+            <property role="TrG5h" value="converter" />
+            <node concept="3uibUv" id="34Q84zM_cgC" role="1tU5fm">
+              <ref role="3uigEE" to="6peh:6jI_U5eOO9F" resolve="M1ToJson" />
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+                  <ref role="2WH_rO" node="34Q84zNkiUe" resolve="incrementWarning" />
+                  <node concept="37vLTw" id="34Q84zNkAOZ" role="2XxRq1">
+                    <ref role="3cqZAo" node="34Q84zMH6Ix" resolve="warnCount" />
+                  </node>
+                </node>
+              </node>
+            </node>
+          </node>
+        </node>
+        <node concept="3vlDli" id="34Q84zM_hvZ" role="3cqZAp">
+          <node concept="3cmrfG" id="34Q84zM_hw0" role="3tpDZB">
+            <property role="3cmrfH" value="1" />
+          </node>
+          <node concept="2OqwBi" id="34Q84zM_hw1" role="3tpDZA">
+            <node concept="1eOMI4" id="34Q84zM_hw2" role="2Oq$k0">
+              <node concept="2OqwBi" id="34Q84zM_hw3" role="1eOMHV">
+                <node concept="2OqwBi" id="34Q84zM_hw4" role="2Oq$k0">
+                  <node concept="37vLTw" id="34Q84zM_hw5" role="2Oq$k0">
+                    <ref role="3cqZAo" node="34Q84zM_hvO" resolve="converter" />
+                  </node>
+                  <node concept="liA8E" id="34Q84zM_hw6" role="2OqNvi">
+                    <ref role="37wK5l" to="6peh:6jI_U5eOR8U" resolve="convert" />
+                    <node concept="Rm8GO" id="34Q84zM_hw7" role="37wK5m">
+                      <ref role="1Px2BO" to="6peh:6jI_U5eOQFV" resolve="M1ToJson.Scope" />
+                      <ref role="Rm8GQ" to="6peh:6jI_U5eOQOm" resolve="closure" />
+                    </node>
+                  </node>
+                </node>
+                <node concept="ANE8D" id="34Q84zM_hw8" role="2OqNvi" />
+              </node>
+            </node>
+            <node concept="34oBXx" id="34Q84zM_hw9" role="2OqNvi" />
+          </node>
+        </node>
+        <node concept="3vlDli" id="34Q84zMHgmz" role="3cqZAp">
+          <node concept="3cmrfG" id="34Q84zMHgm$" role="3tpDZB">
+            <property role="3cmrfH" value="1" />
+          </node>
+          <node concept="2OqwBi" id="34Q84zMHgm_" role="3tpDZA">
+            <node concept="37vLTw" id="34Q84zMHgmA" role="2Oq$k0">
+              <ref role="3cqZAo" node="34Q84zMH6Ix" resolve="warnCount" />
+            </node>
+            <node concept="liA8E" id="34Q84zMHgmB" role="2OqNvi">
+              <ref role="37wK5l" to="i5cy:~AtomicInteger.get()" resolve="get" />
+            </node>
+          </node>
+        </node>
+      </node>
+    </node>
+    <node concept="1LZb2c" id="34Q84zM_h$y" role="1SL9yI">
+      <property role="TrG5h" value="abstractInterface" />
+      <node concept="3cqZAl" id="34Q84zM_h$z" role="3clF45" />
+      <node concept="3clFbS" id="34Q84zM_h$$" role="3clF47">
+        <node concept="3cpWs8" id="34Q84zM_h$_" role="3cqZAp">
+          <node concept="3cpWsn" id="34Q84zM_h$A" role="3cpWs9">
+            <property role="TrG5h" value="input" />
+            <node concept="3Tqbb2" id="34Q84zM_h$B" role="1tU5fm">
+              <ref role="ehGHo" to="nnlr:34Q84zM$f9f" resolve="AbstractInterface" />
+            </node>
+            <node concept="3xONca" id="34Q84zM_h$C" role="33vP2m">
+              <ref role="3xOPvv" node="34Q84zM$D9k" resolve="abstractInterface" />
+            </node>
+          </node>
+        </node>
+        <node concept="3clFbH" id="34Q84zM_h$D" role="3cqZAp" />
+        <node concept="3cpWs8" id="34Q84zMHcwW" role="3cqZAp">
+          <node concept="3cpWsn" id="34Q84zMHcwX" role="3cpWs9">
+            <property role="TrG5h" value="warnCount" />
+            <property role="3TUv4t" value="true" />
+            <node concept="3uibUv" id="34Q84zMHcwY" role="1tU5fm">
+              <ref role="3uigEE" to="i5cy:~AtomicInteger" resolve="AtomicInteger" />
+            </node>
+            <node concept="2ShNRf" id="34Q84zMHcwZ" role="33vP2m">
+              <node concept="1pGfFk" id="34Q84zMHcx0" role="2ShVmc">
+                <ref role="37wK5l" to="i5cy:~AtomicInteger.&lt;init&gt;()" resolve="AtomicInteger" />
+              </node>
+            </node>
+          </node>
+        </node>
+        <node concept="3clFbF" id="34Q84zM_h$E" role="3cqZAp">
+          <node concept="2OqwBi" id="34Q84zM_h$F" role="3clFbG">
+            <node concept="37vLTw" id="34Q84zM_h$G" role="2Oq$k0">
+              <ref role="3cqZAo" node="34Q84zM_h$A" resolve="input" />
+            </node>
+            <node concept="3YRAZt" id="34Q84zM_h$H" role="2OqNvi" />
+          </node>
+        </node>
+        <node concept="3cpWs8" id="34Q84zM_h$I" role="3cqZAp">
+          <node concept="3cpWsn" id="34Q84zM_h$J" role="3cpWs9">
+            <property role="TrG5h" value="converter" />
+            <node concept="3uibUv" id="34Q84zM_h$K" role="1tU5fm">
+              <ref role="3uigEE" to="6peh:6jI_U5eOO9F" resolve="M1ToJson" />
+            </node>
+            <node concept="2ShNRf" id="34Q84zM_h$L" role="33vP2m">
+              <node concept="1pGfFk" id="34Q84zNkBJh" role="2ShVmc">
+                <ref role="37wK5l" to="6peh:5lijfVJTSc9" resolve="M1ToJson" />
+                <node concept="2OqwBi" id="34Q84zM_h$N" role="37wK5m">
+                  <node concept="1jGwE1" id="34Q84zM_h$O" role="2Oq$k0" />
+                  <node concept="liA8E" id="34Q84zM_h$P" role="2OqNvi">
+                    <ref role="37wK5l" to="mhbf:~SModel.getRepository()" resolve="getRepository" />
+                  </node>
+                </node>
+                <node concept="2ShNRf" id="34Q84zM_h$Q" role="37wK5m">
+                  <node concept="2HTt$P" id="34Q84zM_h$R" role="2ShVmc">
+                    <node concept="3uibUv" id="34Q84zM_h$S" role="2HTBi0">
+                      <ref role="3uigEE" to="mhbf:~SNode" resolve="SNode" />
+                    </node>
+                    <node concept="37vLTw" id="34Q84zM_h$T" role="2HTEbv">
+                      <ref role="3cqZAo" node="34Q84zM_h$A" resolve="input" />
+                    </node>
+                  </node>
+                </node>
+              </node>
+            </node>
+          </node>
+        </node>
+        <node concept="3clFbF" id="34Q84zNkCbQ" role="3cqZAp">
+          <node concept="2OqwBi" id="34Q84zNkCbR" role="3clFbG">
+            <node concept="37vLTw" id="34Q84zNkCbS" role="2Oq$k0">
+              <ref role="3cqZAo" node="34Q84zM_h$J" resolve="converter" />
+            </node>
+            <node concept="liA8E" id="34Q84zNkCbT" role="2OqNvi">
+              <ref role="37wK5l" to="6peh:34Q84zNjWLd" resolve="setWarner" />
+              <node concept="2OqwBi" id="34Q84zNkCbU" role="37wK5m">
+                <node concept="2WthIp" id="34Q84zNkCbV" role="2Oq$k0" />
+                <node concept="2XshWL" id="34Q84zNkCbW" role="2OqNvi">
+                  <ref role="2WH_rO" node="34Q84zNkiUe" resolve="incrementWarning" />
+                  <node concept="37vLTw" id="34Q84zNkCbX" role="2XxRq1">
+                    <ref role="3cqZAo" node="34Q84zMHcwX" resolve="warnCount" />
+                  </node>
+                </node>
+              </node>
+            </node>
+          </node>
+        </node>
+        <node concept="3vlDli" id="34Q84zM_h$U" role="3cqZAp">
+          <node concept="3cmrfG" id="34Q84zM_h$V" role="3tpDZB">
+            <property role="3cmrfH" value="0" />
+          </node>
+          <node concept="2OqwBi" id="34Q84zM_h$W" role="3tpDZA">
+            <node concept="1eOMI4" id="34Q84zM_h$X" role="2Oq$k0">
+              <node concept="2OqwBi" id="34Q84zM_h$Y" role="1eOMHV">
+                <node concept="2OqwBi" id="34Q84zM_h$Z" role="2Oq$k0">
+                  <node concept="37vLTw" id="34Q84zM_h_0" role="2Oq$k0">
+                    <ref role="3cqZAo" node="34Q84zM_h$J" resolve="converter" />
+                  </node>
+                  <node concept="liA8E" id="34Q84zM_h_1" role="2OqNvi">
+                    <ref role="37wK5l" to="6peh:6jI_U5eOR8U" resolve="convert" />
+                    <node concept="Rm8GO" id="34Q84zM_h_2" role="37wK5m">
+                      <ref role="1Px2BO" to="6peh:6jI_U5eOQFV" resolve="M1ToJson.Scope" />
+                      <ref role="Rm8GQ" to="6peh:6jI_U5eOQOm" resolve="closure" />
+                    </node>
+                  </node>
+                </node>
+                <node concept="ANE8D" id="34Q84zM_h_3" role="2OqNvi" />
+              </node>
+            </node>
+            <node concept="34oBXx" id="34Q84zM_h_4" role="2OqNvi" />
+          </node>
+        </node>
+        <node concept="3vlDli" id="34Q84zMHi7t" role="3cqZAp">
+          <node concept="3cmrfG" id="34Q84zMHi7u" role="3tpDZB">
+            <property role="3cmrfH" value="1" />
+          </node>
+          <node concept="2OqwBi" id="34Q84zMHi7v" role="3tpDZA">
+            <node concept="37vLTw" id="34Q84zMHi7w" role="2Oq$k0">
+              <ref role="3cqZAo" node="34Q84zMHcwX" resolve="warnCount" />
+            </node>
+            <node concept="liA8E" id="34Q84zMHi7x" role="2OqNvi">
+              <ref role="37wK5l" to="i5cy:~AtomicInteger.get()" resolve="get" />
+            </node>
+          </node>
+        </node>
+      </node>
+    </node>
+  </node>
 </model>
 
diff --git a/solutions/io.lionweb.mps.json/models/io.lionweb.mps.json.instance.mps2lionweb.mps b/solutions/io.lionweb.mps.json/models/io.lionweb.mps.json.instance.mps2lionweb.mps
index 08f13a9..0693616 100644
--- a/solutions/io.lionweb.mps.json/models/io.lionweb.mps.json.instance.mps2lionweb.mps
+++ b/solutions/io.lionweb.mps.json/models/io.lionweb.mps.json.instance.mps2lionweb.mps
@@ -24,6 +24,8 @@
     <import index="pe0e" ref="r:00cfecac-5da5-48e5-8a70-507b9f69321c(io.lionweb.mps.json.instance.lionweb2mps)" />
     <import index="6peh" ref="r:677983a1-6578-432d-8175-68c906e0375c(io.lionweb.mps.json)" />
     <import index="imb3" ref="9d6d7230-3178-4b3f-a837-7c0180c86207/java:io.lionweb.lioncore.java.language(io.lionweb.lionweb.java/)" />
+    <import index="82uw" ref="6354ebe7-c22a-4a0f-ac54-50b52ab9b065/java:java.util.function(JDK/)" />
+    <import index="guwi" ref="6354ebe7-c22a-4a0f-ac54-50b52ab9b065/java:java.io(JDK/)" implicit="true" />
     <import index="teza" ref="r:84248d29-a48a-459b-8ba9-05c71de1fb63(io.lionweb.mps.converter.m2.idmapper)" implicit="true" />
   </imports>
   <registry>
@@ -183,6 +185,11 @@
         <child id="1178549979242" name="visibility" index="1B3o_S" />
       </concept>
       <concept id="1107796713796" name="jetbrains.mps.baseLanguage.structure.Interface" flags="ig" index="3HP615" />
+      <concept id="1163668896201" name="jetbrains.mps.baseLanguage.structure.TernaryOperatorExpression" flags="nn" index="3K4zz7">
+        <child id="1163668914799" name="condition" index="3K4Cdx" />
+        <child id="1163668922816" name="ifTrue" index="3K4E3e" />
+        <child id="1163668934364" name="ifFalse" index="3K4GZi" />
+      </concept>
       <concept id="6329021646629104954" name="jetbrains.mps.baseLanguage.structure.SingleLineComment" flags="nn" index="3SKdUt">
         <child id="8356039341262087992" name="line" index="1aUNEU" />
       </concept>
@@ -458,6 +465,76 @@
       </node>
     </node>
     <node concept="2tJIrI" id="48csSBNwcCZ" role="jymVt" />
+    <node concept="312cEg" id="34Q84zNhYxK" role="jymVt">
+      <property role="TrG5h" value="warner" />
+      <node concept="3Tm6S6" id="34Q84zNhX5k" role="1B3o_S" />
+      <node concept="3uibUv" id="34Q84zNhXHc" role="1tU5fm">
+        <ref role="3uigEE" to="82uw:~BiConsumer" resolve="BiConsumer" />
+        <node concept="17QB3L" id="34Q84zNhY9w" role="11_B2D" />
+        <node concept="3uibUv" id="34Q84zNhY9Z" role="11_B2D">
+          <ref role="3uigEE" to="mhbf:~SNode" resolve="SNode" />
+        </node>
+      </node>
+      <node concept="1bVj0M" id="34Q84zNiiHB" role="33vP2m">
+        <node concept="37vLTG" id="34Q84zNiiTf" role="1bW2Oz">
+          <property role="TrG5h" value="message" />
+          <node concept="17QB3L" id="34Q84zNij7E" role="1tU5fm" />
+        </node>
+        <node concept="37vLTG" id="34Q84zNijTd" role="1bW2Oz">
+          <property role="TrG5h" value="mps" />
+          <node concept="3uibUv" id="34Q84zNikdK" role="1tU5fm">
+            <ref role="3uigEE" to="mhbf:~SNode" resolve="SNode" />
+          </node>
+        </node>
+        <node concept="3clFbS" id="34Q84zNiiHD" role="1bW5cS">
+          <node concept="3clFbF" id="34Q84zMBajZ" role="3cqZAp">
+            <node concept="2OqwBi" id="34Q84zMBajW" role="3clFbG">
+              <node concept="10M0yZ" id="34Q84zMBajX" role="2Oq$k0">
+                <ref role="1PxDUh" to="wyt6:~System" resolve="System" />
+                <ref role="3cqZAo" to="wyt6:~System.err" resolve="err" />
+              </node>
+              <node concept="liA8E" id="34Q84zMBajY" role="2OqNvi">
+                <ref role="37wK5l" to="guwi:~PrintStream.println(java.lang.String)" resolve="println" />
+                <node concept="3cpWs3" id="34Q84zMD1p_" role="37wK5m">
+                  <node concept="37vLTw" id="34Q84zMDmIO" role="3uHU7B">
+                    <ref role="3cqZAo" node="34Q84zNiiTf" resolve="message" />
+                  </node>
+                  <node concept="1eOMI4" id="34Q84zMEtVU" role="3uHU7w">
+                    <node concept="3K4zz7" id="34Q84zMDWQX" role="1eOMHV">
+                      <node concept="2OqwBi" id="34Q84zME5mW" role="3K4E3e">
+                        <node concept="37vLTw" id="34Q84zME1pS" role="2Oq$k0">
+                          <ref role="3cqZAo" node="34Q84zNijTd" resolve="mps" />
+                        </node>
+                        <node concept="liA8E" id="34Q84zME9X0" role="2OqNvi">
+                          <ref role="37wK5l" to="mhbf:~SNode.getPresentation()" resolve="getPresentation" />
+                        </node>
+                      </node>
+                      <node concept="Xl_RD" id="34Q84zMEeAL" role="3K4GZi">
+                        <property role="Xl_RC" value="" />
+                      </node>
+                      <node concept="3y3z36" id="34Q84zMDOs5" role="3K4Cdx">
+                        <node concept="10Nm6u" id="34Q84zMDT89" role="3uHU7w" />
+                        <node concept="37vLTw" id="34Q84zMD5Ry" role="3uHU7B">
+                          <ref role="3cqZAo" node="34Q84zNijTd" resolve="mps" />
+                        </node>
+                      </node>
+                    </node>
+                  </node>
+                </node>
+              </node>
+            </node>
+          </node>
+        </node>
+      </node>
+      <node concept="z59LJ" id="34Q84zNhZAW" role="lGtFl">
+        <node concept="TZ5HA" id="34Q84zNhZAX" role="TZ5H$">
+          <node concept="1dT_AC" id="34Q84zNhZAY" role="1dT_Ay">
+            <property role="1dT_AB" value="Called to emit warnings." />
+          </node>
+        </node>
+      </node>
+    </node>
+    <node concept="2tJIrI" id="34Q84zNi9mz" role="jymVt" />
     <node concept="2tJIrI" id="48csSBOkZqp" role="jymVt" />
     <node concept="3clFbW" id="48csSBNwcss" role="jymVt">
       <node concept="3cqZAl" id="48csSBNwcsu" role="3clF45" />
@@ -693,10 +770,18 @@
               <node concept="10Nm6u" id="5AGBwuFE38Z" role="3cqZAk" />
             </node>
           </node>
-          <node concept="1rXfSq" id="utjSYFaTEf" role="3clFbw">
-            <ref role="37wK5l" node="utjSYFaTEb" resolve="isSmartReference" />
-            <node concept="37vLTw" id="utjSYFaTEe" role="37wK5m">
-              <ref role="3cqZAo" node="48csSBNwwXQ" resolve="mps" />
+          <node concept="22lmx$" id="34Q84zMEyZY" role="3clFbw">
+            <node concept="1rXfSq" id="34Q84zMEBWx" role="3uHU7w">
+              <ref role="37wK5l" node="34Q84zMAb8x" resolve="isAbstractInstance" />
+              <node concept="37vLTw" id="34Q84zMEFkz" role="37wK5m">
+                <ref role="3cqZAo" node="48csSBNwwXQ" resolve="mps" />
+              </node>
+            </node>
+            <node concept="1rXfSq" id="utjSYFaTEf" role="3uHU7B">
+              <ref role="37wK5l" node="utjSYFaTEb" resolve="isSmartReference" />
+              <node concept="37vLTw" id="utjSYFaTEe" role="37wK5m">
+                <ref role="3cqZAo" node="48csSBNwwXQ" resolve="mps" />
+              </node>
             </node>
           </node>
         </node>
@@ -3104,6 +3189,117 @@
         </node>
       </node>
     </node>
+    <node concept="2tJIrI" id="34Q84zMA1YK" role="jymVt" />
+    <node concept="3clFb_" id="34Q84zMAb8x" role="jymVt">
+      <property role="TrG5h" value="isAbstractInstance" />
+      <node concept="3clFbS" id="34Q84zMAb8$" role="3clF47">
+        <node concept="3clFbJ" id="34Q84zMAldg" role="3cqZAp">
+          <node concept="2OqwBi" id="34Q84zMAAlN" role="3clFbw">
+            <node concept="2OqwBi" id="34Q84zMAt7M" role="2Oq$k0">
+              <node concept="37vLTw" id="34Q84zMApAH" role="2Oq$k0">
+                <ref role="3cqZAo" node="34Q84zMAfXN" resolve="mps" />
+              </node>
+              <node concept="liA8E" id="34Q84zMAxAC" role="2OqNvi">
+                <ref role="37wK5l" to="mhbf:~SNode.getConcept()" resolve="getConcept" />
+              </node>
+            </node>
+            <node concept="liA8E" id="34Q84zMAESU" role="2OqNvi">
+              <ref role="37wK5l" to="c17a:~SAbstractConcept.isAbstract()" resolve="isAbstract" />
+            </node>
+          </node>
+          <node concept="3clFbS" id="34Q84zMAldi" role="3clFbx">
+            <node concept="3clFbF" id="34Q84zMDqVh" role="3cqZAp">
+              <node concept="1rXfSq" id="34Q84zMDqVg" role="3clFbG">
+                <ref role="37wK5l" node="34Q84zMAVV8" resolve="warn" />
+                <node concept="3cpWs3" id="34Q84zMCJU6" role="37wK5m">
+                  <node concept="3cpWs3" id="34Q84zMCdUE" role="3uHU7B">
+                    <node concept="Xl_RD" id="34Q84zMBfmj" role="3uHU7B">
+                      <property role="Xl_RC" value="WARN: Ignoring instance of abstract concept '" />
+                    </node>
+                    <node concept="2OqwBi" id="34Q84zMCvbC" role="3uHU7w">
+                      <node concept="2OqwBi" id="34Q84zMCm0X" role="2Oq$k0">
+                        <node concept="37vLTw" id="34Q84zMCiil" role="2Oq$k0">
+                          <ref role="3cqZAo" node="34Q84zMAfXN" resolve="mps" />
+                        </node>
+                        <node concept="liA8E" id="34Q84zMCrcY" role="2OqNvi">
+                          <ref role="37wK5l" to="mhbf:~SNode.getConcept()" resolve="getConcept" />
+                        </node>
+                      </node>
+                      <node concept="liA8E" id="34Q84zMCzLf" role="2OqNvi">
+                        <ref role="37wK5l" to="c17a:~SAbstractConcept.getName()" resolve="getName" />
+                      </node>
+                    </node>
+                  </node>
+                  <node concept="Xl_RD" id="34Q84zMCNhi" role="3uHU7w">
+                    <property role="Xl_RC" value="': " />
+                  </node>
+                </node>
+                <node concept="37vLTw" id="34Q84zMDBwU" role="37wK5m">
+                  <ref role="3cqZAo" node="34Q84zMAfXN" resolve="mps" />
+                </node>
+              </node>
+            </node>
+            <node concept="3cpWs6" id="34Q84zMF5i3" role="3cqZAp">
+              <node concept="3clFbT" id="34Q84zMF8k5" role="3cqZAk">
+                <property role="3clFbU" value="true" />
+              </node>
+            </node>
+          </node>
+        </node>
+        <node concept="3cpWs6" id="34Q84zMFfB6" role="3cqZAp">
+          <node concept="3clFbT" id="34Q84zMFfC1" role="3cqZAk" />
+        </node>
+      </node>
+      <node concept="3Tm6S6" id="34Q84zMAImx" role="1B3o_S" />
+      <node concept="10P_77" id="34Q84zMAaZ7" role="3clF45" />
+      <node concept="37vLTG" id="34Q84zMAfXN" role="3clF46">
+        <property role="TrG5h" value="mps" />
+        <node concept="3uibUv" id="34Q84zMAfXM" role="1tU5fm">
+          <ref role="3uigEE" to="mhbf:~SNode" resolve="SNode" />
+        </node>
+      </node>
+    </node>
+    <node concept="2tJIrI" id="34Q84zMAN88" role="jymVt" />
+    <node concept="3clFb_" id="34Q84zMAVV8" role="jymVt">
+      <property role="TrG5h" value="warn" />
+      <node concept="3clFbS" id="34Q84zMAVVb" role="3clF47">
+        <node concept="3clFbF" id="34Q84zNiqkx" role="3cqZAp">
+          <node concept="2OqwBi" id="34Q84zNiv7I" role="3clFbG">
+            <node concept="37vLTw" id="34Q84zNiqkw" role="2Oq$k0">
+              <ref role="3cqZAo" node="34Q84zNhYxK" resolve="warner" />
+            </node>
+            <node concept="liA8E" id="34Q84zNi$6w" role="2OqNvi">
+              <ref role="37wK5l" to="82uw:~BiConsumer.accept(java.lang.Object,java.lang.Object)" resolve="accept" />
+              <node concept="37vLTw" id="34Q84zNiBv6" role="37wK5m">
+                <ref role="3cqZAo" node="34Q84zMB10k" resolve="message" />
+              </node>
+              <node concept="37vLTw" id="34Q84zNiKzz" role="37wK5m">
+                <ref role="3cqZAo" node="34Q84zMB4Tz" resolve="mps" />
+              </node>
+            </node>
+          </node>
+        </node>
+      </node>
+      <node concept="3Tmbuc" id="34Q84zMARCx" role="1B3o_S" />
+      <node concept="3cqZAl" id="34Q84zMAVLI" role="3clF45" />
+      <node concept="37vLTG" id="34Q84zMB10k" role="3clF46">
+        <property role="TrG5h" value="message" />
+        <node concept="17QB3L" id="34Q84zMB10j" role="1tU5fm" />
+        <node concept="2AHcQZ" id="34Q84zMB9yq" role="2AJF6D">
+          <ref role="2AI5Lk" to="mhfm:~NotNull" resolve="NotNull" />
+        </node>
+      </node>
+      <node concept="37vLTG" id="34Q84zMB4Tz" role="3clF46">
+        <property role="TrG5h" value="mps" />
+        <node concept="3uibUv" id="34Q84zMB935" role="1tU5fm">
+          <ref role="3uigEE" to="mhbf:~SNode" resolve="SNode" />
+        </node>
+        <node concept="2AHcQZ" id="34Q84zMB9Xi" role="2AJF6D">
+          <ref role="2AI5Lk" to="mhfm:~Nullable" resolve="Nullable" />
+        </node>
+      </node>
+    </node>
+    <node concept="2tJIrI" id="34Q84zNjR2Y" role="jymVt" />
     <node concept="3Tm1VV" id="48csSBNvYv1" role="1B3o_S" />
     <node concept="3UR2Jj" id="3Kqiw5yA3U5" role="lGtFl">
       <node concept="TZ5HA" id="3Kqiw5yA3U6" role="TZ5H$">
@@ -3160,6 +3356,57 @@
         </node>
       </node>
     </node>
+    <node concept="3clFb_" id="34Q84zNjL5C" role="jymVt">
+      <property role="TrG5h" value="getWarner" />
+      <node concept="3uibUv" id="34Q84zNjL5D" role="3clF45">
+        <ref role="3uigEE" to="82uw:~BiConsumer" resolve="BiConsumer" />
+        <node concept="17QB3L" id="34Q84zNjL5E" role="11_B2D" />
+        <node concept="3uibUv" id="34Q84zNjL5F" role="11_B2D">
+          <ref role="3uigEE" to="mhbf:~SNode" resolve="SNode" />
+        </node>
+      </node>
+      <node concept="3Tm1VV" id="34Q84zNjL5G" role="1B3o_S" />
+      <node concept="3clFbS" id="34Q84zNjL5H" role="3clF47">
+        <node concept="3clFbF" id="34Q84zNjL5I" role="3cqZAp">
+          <node concept="2OqwBi" id="34Q84zNjL5_" role="3clFbG">
+            <node concept="Xjq3P" id="34Q84zNjL5A" role="2Oq$k0" />
+            <node concept="2OwXpG" id="34Q84zNjL5B" role="2OqNvi">
+              <ref role="2Oxat5" node="34Q84zNhYxK" resolve="warner" />
+            </node>
+          </node>
+        </node>
+      </node>
+    </node>
+    <node concept="3clFb_" id="34Q84zNjL5J" role="jymVt">
+      <property role="TrG5h" value="setWarner" />
+      <node concept="3cqZAl" id="34Q84zNjL5K" role="3clF45" />
+      <node concept="3Tm1VV" id="34Q84zNjL5L" role="1B3o_S" />
+      <node concept="3clFbS" id="34Q84zNjL5M" role="3clF47">
+        <node concept="3clFbF" id="34Q84zNjL5N" role="3cqZAp">
+          <node concept="37vLTI" id="34Q84zNjL5O" role="3clFbG">
+            <node concept="37vLTw" id="34Q84zNjL5P" role="37vLTx">
+              <ref role="3cqZAo" node="34Q84zNjL5Q" resolve="warner" />
+            </node>
+            <node concept="2OqwBi" id="34Q84zNjL5y" role="37vLTJ">
+              <node concept="Xjq3P" id="34Q84zNjL5z" role="2Oq$k0" />
+              <node concept="2OwXpG" id="34Q84zNjL5$" role="2OqNvi">
+                <ref role="2Oxat5" node="34Q84zNhYxK" resolve="warner" />
+              </node>
+            </node>
+          </node>
+        </node>
+      </node>
+      <node concept="37vLTG" id="34Q84zNjL5Q" role="3clF46">
+        <property role="TrG5h" value="warner" />
+        <node concept="3uibUv" id="34Q84zNjL5R" role="1tU5fm">
+          <ref role="3uigEE" to="82uw:~BiConsumer" resolve="BiConsumer" />
+          <node concept="17QB3L" id="34Q84zNjL5S" role="11_B2D" />
+          <node concept="3uibUv" id="34Q84zNjL5T" role="11_B2D">
+            <ref role="3uigEE" to="mhbf:~SNode" resolve="SNode" />
+          </node>
+        </node>
+      </node>
+    </node>
   </node>
   <node concept="312cEu" id="6VkSF6aDTO9">
     <property role="TrG5h" value="ListedMps2LionWebConverter" />
diff --git a/solutions/io.lionweb.mps.json/models/io.lionweb.mps.json.mps b/solutions/io.lionweb.mps.json/models/io.lionweb.mps.json.mps
index 3e44860..b1804af 100644
--- a/solutions/io.lionweb.mps.json/models/io.lionweb.mps.json.mps
+++ b/solutions/io.lionweb.mps.json/models/io.lionweb.mps.json.mps
@@ -9,12 +9,12 @@
   </languages>
   <imports>
     <import index="guwi" ref="6354ebe7-c22a-4a0f-ac54-50b52ab9b065/java:java.io(JDK/)" />
-    <import index="wy2b" ref="9d6d7230-3178-4b3f-a837-7c0180c86207/java:com.google.gson(io.lionweb.lioncore.java/)" />
+    <import index="wy2b" ref="9d6d7230-3178-4b3f-a837-7c0180c86207/java:com.google.gson(io.lionweb.lionweb.java/)" />
     <import index="c9jv" ref="9d6d7230-3178-4b3f-a837-7c0180c86207/java:com.google.gson.stream(io.lionweb.lionweb.java/)" />
     <import index="7x5y" ref="6354ebe7-c22a-4a0f-ac54-50b52ab9b065/java:java.nio.charset(JDK/)" />
-    <import index="xfsv" ref="9d6d7230-3178-4b3f-a837-7c0180c86207/java:io.lionweb.lioncore.java.serialization.data(io.lionweb.lioncore.java/)" />
-    <import index="jxh5" ref="9d6d7230-3178-4b3f-a837-7c0180c86207/java:io.lionweb.lioncore.java.serialization(io.lionweb.lioncore.java/)" />
-    <import index="1ppu" ref="9d6d7230-3178-4b3f-a837-7c0180c86207/java:io.lionweb.lioncore.java.model(io.lionweb.lioncore.java/)" />
+    <import index="xfsv" ref="9d6d7230-3178-4b3f-a837-7c0180c86207/java:io.lionweb.lioncore.java.serialization.data(io.lionweb.lionweb.java/)" />
+    <import index="jxh5" ref="9d6d7230-3178-4b3f-a837-7c0180c86207/java:io.lionweb.lioncore.java.serialization(io.lionweb.lionweb.java/)" />
+    <import index="1ppu" ref="9d6d7230-3178-4b3f-a837-7c0180c86207/java:io.lionweb.lioncore.java.model(io.lionweb.lionweb.java/)" />
     <import index="33ny" ref="6354ebe7-c22a-4a0f-ac54-50b52ab9b065/java:java.util(JDK/)" />
     <import index="mhfm" ref="3f233e7f-b8a6-46d2-a57f-795d56775243/java:org.jetbrains.annotations(Annotations/)" />
     <import index="imb3" ref="9d6d7230-3178-4b3f-a837-7c0180c86207/java:io.lionweb.lioncore.java.language(io.lionweb.lionweb.java/)" />
@@ -30,6 +30,7 @@
     <import index="j5yh" ref="r:137003c8-aa9f-4bda-ae9b-f5d7ec2da82c(io.lionweb.mps.json.idmapper)" />
     <import index="pe0e" ref="r:00cfecac-5da5-48e5-8a70-507b9f69321c(io.lionweb.mps.json.instance.lionweb2mps)" />
     <import index="apzt" ref="r:ea3bdd37-0680-4524-8252-d8093e3b6903(io.lionweb.mps.converter.util)" />
+    <import index="82uw" ref="6354ebe7-c22a-4a0f-ac54-50b52ab9b065/java:java.util.function(JDK/)" />
     <import index="tzx8" ref="9d6d7230-3178-4b3f-a837-7c0180c86207/java:io.lionweb.lioncore.java.model.impl(io.lionweb.lionweb.java/)" implicit="true" />
   </imports>
   <registry>
@@ -179,6 +180,7 @@
       <concept id="7812454656619025412" name="jetbrains.mps.baseLanguage.structure.LocalMethodCall" flags="nn" index="1rXfSq" />
       <concept id="1107535904670" name="jetbrains.mps.baseLanguage.structure.ClassifierType" flags="in" index="3uibUv">
         <reference id="1107535924139" name="classifier" index="3uigEE" />
+        <child id="1109201940907" name="parameter" index="11_B2D" />
       </concept>
       <concept id="1081773326031" name="jetbrains.mps.baseLanguage.structure.BinaryOperation" flags="nn" index="3uHJSO">
         <child id="1081773367579" name="rightExpression" index="3uHU7w" />
@@ -2557,6 +2559,32 @@
           </node>
         </node>
       </node>
+      <node concept="2AHcQZ" id="34Q84zNk7te" role="2AJF6D">
+        <ref role="2AI5Lk" to="mhfm:~Nullable" resolve="Nullable" />
+      </node>
+    </node>
+    <node concept="2tJIrI" id="34Q84zNhVUi" role="jymVt" />
+    <node concept="312cEg" id="34Q84zNhYxK" role="jymVt">
+      <property role="TrG5h" value="warner" />
+      <node concept="3Tm6S6" id="34Q84zNhX5k" role="1B3o_S" />
+      <node concept="3uibUv" id="34Q84zNhXHc" role="1tU5fm">
+        <ref role="3uigEE" to="82uw:~BiConsumer" resolve="BiConsumer" />
+        <node concept="17QB3L" id="34Q84zNhY9w" role="11_B2D" />
+        <node concept="3uibUv" id="34Q84zNhY9Z" role="11_B2D">
+          <ref role="3uigEE" to="mhbf:~SNode" resolve="SNode" />
+        </node>
+      </node>
+      <node concept="10Nm6u" id="34Q84zNhZzN" role="33vP2m" />
+      <node concept="z59LJ" id="34Q84zNhZAW" role="lGtFl">
+        <node concept="TZ5HA" id="34Q84zNhZAX" role="TZ5H$">
+          <node concept="1dT_AC" id="34Q84zNhZAY" role="1dT_Ay">
+            <property role="1dT_AB" value="If set, called to emit warnings." />
+          </node>
+        </node>
+      </node>
+      <node concept="2AHcQZ" id="34Q84zNk6OZ" role="2AJF6D">
+        <ref role="2AI5Lk" to="mhfm:~Nullable" resolve="Nullable" />
+      </node>
     </node>
     <node concept="2tJIrI" id="zA8J4H_W7T" role="jymVt" />
     <node concept="2tJIrI" id="6jI_U5ePssC" role="jymVt" />
@@ -2644,7 +2672,7 @@
                     <ref role="3cqZAo" node="5TNjoy1ALrE" resolve="converter" />
                   </node>
                   <node concept="2ShNRf" id="6jI_U5eP5Iw" role="37vLTx">
-                    <node concept="1pGfFk" id="6jI_U5eP5Ix" role="2ShVmc">
+                    <node concept="1pGfFk" id="34Q84zNk2WC" role="2ShVmc">
                       <ref role="37wK5l" to="lai5:6VkSF6aDU2Q" resolve="ListedMps2LionWebConverter" />
                       <node concept="37vLTw" id="6jI_U5eP5Iy" role="37wK5m">
                         <ref role="3cqZAo" node="5TNjoy1Aj0R" resolve="attributeFinder" />
@@ -2686,7 +2714,7 @@
                     <ref role="3cqZAo" node="5TNjoy1ALrE" resolve="converter" />
                   </node>
                   <node concept="2ShNRf" id="6jI_U5eP5IC" role="37vLTx">
-                    <node concept="1pGfFk" id="6jI_U5eP5ID" role="2ShVmc">
+                    <node concept="1pGfFk" id="34Q84zNk3t_" role="2ShVmc">
                       <ref role="37wK5l" to="lai5:6VkSF6aDU_3" resolve="DescendantMps2LionWebConverter" />
                       <node concept="37vLTw" id="6jI_U5eP5IE" role="37wK5m">
                         <ref role="3cqZAo" node="5TNjoy1Aj0R" resolve="attributeFinder" />
@@ -2729,7 +2757,7 @@
                     <ref role="3uigEE" to="lai5:6VkSF6aF166" resolve="ClosureMps2LionWebConverter" />
                   </node>
                   <node concept="2ShNRf" id="zA8J4H_YdL" role="33vP2m">
-                    <node concept="1pGfFk" id="zA8J4H_YdM" role="2ShVmc">
+                    <node concept="1pGfFk" id="34Q84zNk4hp" role="2ShVmc">
                       <ref role="37wK5l" to="lai5:6VkSF6aF169" resolve="ClosureMps2LionWebConverter" />
                       <node concept="37vLTw" id="zA8J4H_YdN" role="37wK5m">
                         <ref role="3cqZAo" node="5TNjoy1Aj0R" resolve="attributeFinder" />
@@ -2796,6 +2824,30 @@
             </node>
           </node>
         </node>
+        <node concept="3clFbH" id="34Q84zNk4Ca" role="3cqZAp" />
+        <node concept="3clFbJ" id="34Q84zNk502" role="3cqZAp">
+          <node concept="3clFbS" id="34Q84zNk504" role="3clFbx">
+            <node concept="3clFbF" id="34Q84zNk9ca" role="3cqZAp">
+              <node concept="2OqwBi" id="34Q84zNk9UH" role="3clFbG">
+                <node concept="37vLTw" id="34Q84zNk9c8" role="2Oq$k0">
+                  <ref role="3cqZAo" node="5TNjoy1ALrE" resolve="converter" />
+                </node>
+                <node concept="liA8E" id="34Q84zNkalr" role="2OqNvi">
+                  <ref role="37wK5l" to="lai5:34Q84zNjL5J" resolve="setWarner" />
+                  <node concept="37vLTw" id="34Q84zNkaGe" role="37wK5m">
+                    <ref role="3cqZAo" node="34Q84zNhYxK" resolve="warner" />
+                  </node>
+                </node>
+              </node>
+            </node>
+          </node>
+          <node concept="3y3z36" id="34Q84zNk69E" role="3clFbw">
+            <node concept="10Nm6u" id="34Q84zNk6vl" role="3uHU7w" />
+            <node concept="37vLTw" id="34Q84zNk5mI" role="3uHU7B">
+              <ref role="3cqZAo" node="34Q84zNhYxK" resolve="warner" />
+            </node>
+          </node>
+        </node>
         <node concept="3clFbH" id="6jI_U5eP8fj" role="3cqZAp" />
         <node concept="3clFbF" id="6jI_U5ePqYv" role="3cqZAp">
           <node concept="37vLTI" id="6jI_U5ePqYx" role="3clFbG">
@@ -2922,6 +2974,40 @@
       </node>
     </node>
     <node concept="2tJIrI" id="5TNjoy1AFZF" role="jymVt" />
+    <node concept="3clFb_" id="34Q84zNjWLd" role="jymVt">
+      <property role="TrG5h" value="setWarner" />
+      <node concept="3cqZAl" id="34Q84zNjWLe" role="3clF45" />
+      <node concept="3Tm1VV" id="34Q84zNjWLf" role="1B3o_S" />
+      <node concept="3clFbS" id="34Q84zNjWLg" role="3clF47">
+        <node concept="3clFbF" id="34Q84zNjWLh" role="3cqZAp">
+          <node concept="37vLTI" id="34Q84zNjWLi" role="3clFbG">
+            <node concept="37vLTw" id="34Q84zNjWLj" role="37vLTx">
+              <ref role="3cqZAo" node="34Q84zNjWLk" resolve="warner" />
+            </node>
+            <node concept="2OqwBi" id="34Q84zNjWLa" role="37vLTJ">
+              <node concept="Xjq3P" id="34Q84zNjWLb" role="2Oq$k0" />
+              <node concept="2OwXpG" id="34Q84zNjWLc" role="2OqNvi">
+                <ref role="2Oxat5" node="34Q84zNhYxK" resolve="warner" />
+              </node>
+            </node>
+          </node>
+        </node>
+      </node>
+      <node concept="37vLTG" id="34Q84zNjWLk" role="3clF46">
+        <property role="TrG5h" value="warner" />
+        <node concept="3uibUv" id="34Q84zNjWLl" role="1tU5fm">
+          <ref role="3uigEE" to="82uw:~BiConsumer" resolve="BiConsumer" />
+          <node concept="17QB3L" id="34Q84zNjWLm" role="11_B2D" />
+          <node concept="3uibUv" id="34Q84zNjWLn" role="11_B2D">
+            <ref role="3uigEE" to="mhbf:~SNode" resolve="SNode" />
+          </node>
+        </node>
+        <node concept="2AHcQZ" id="34Q84zNk8wb" role="2AJF6D">
+          <ref role="2AI5Lk" to="mhfm:~NotNull" resolve="NotNull" />
+        </node>
+      </node>
+    </node>
+    <node concept="2tJIrI" id="34Q84zNk0BW" role="jymVt" />
     <node concept="3clFb_" id="5TNjoy1AGgF" role="jymVt">
       <property role="TrG5h" value="initHelpers" />
       <node concept="3Tmbuc" id="5TNjoy1AGhj" role="1B3o_S" />
@@ -2967,7 +3053,6 @@
         <ref role="2AI5Lk" to="wyt6:~Override" resolve="Override" />
       </node>
     </node>
-    <node concept="2tJIrI" id="6jI_U5eOQwf" role="jymVt" />
     <node concept="3Tm1VV" id="6jI_U5eOO9G" role="1B3o_S" />
     <node concept="3uibUv" id="5TNjoy1As_M" role="1zkMxy">
       <ref role="3uigEE" node="5TNjoy1_S6C" resolve="AXToJson" />