Try get methods for buf #805

Job	Run time
minrust	1m 31s
miri	3h 26m 45s
cross (i686-unknown-linux-gnu)	35s
loom	22s
cross (armv7-unknown-linux-gnueabihf)	32s
nightly	1m 13s
panic=abort tests	31s
cross (powerpc-unknown-linux-gnu)	35s
cross (powerpc64-unknown-linux-gnu)	34s
rustfmt	15s
cross (wasm32-unknown-unknown)	12s
stable (ubuntu-latest)	1m 42s
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stable (macos-latest)	1m 37s
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	3h 41m 8s

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