Try get methods for buf #806

Job	Run time
cross (i686-unknown-linux-gnu)	40s
loom	28s
miri	3h 57m 4s
cross (armv7-unknown-linux-gnueabihf)	39s
minrust	1m 41s
cross (powerpc-unknown-linux-gnu)	36s
cross (powerpc64-unknown-linux-gnu)	38s
nightly	1m 16s
panic=abort tests	39s
rustfmt	11s
stable (ubuntu-latest)	1m 42s
tsan	1m 21s
cross (wasm32-unknown-unknown)	15s
stable (macos-latest)	1m 39s
stable (windows-latest)	3m 36s
Publish Documentation	13s
	4h 12m 38s

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