test for immutable collection before attempting to remove CREATE_NEW … #264
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…option.
Issue #, if available:
#158
Description of changes:
fixes by catching
UnsupportedOperationExceptionand ignoring it if theCREATE_NEWoption is not present or the collection is empty.By submitting this pull request, I confirm that you can use, modify, copy, and redistribute this contribution, under the terms of your choice.