Merge pull request #301 from hatoo/argument-add-trait #198

Job	Run time
test (cd bril-rs && make test TURNTARGS=-v)	4m 50s
test (cd bril-rs && make features)	3m 22s
test (cd brilirs && make test TURNTARGS=-v)	2m 14s
rust-ci (brilirs/Cargo.toml)	1m 29s
test (cd brilirs && make benchmark TURNTARGS=-v)	1m 55s
rust-ci (bril-rs/Cargo.toml)	49s
test (cd brilift && cargo build --release && make rt.o && make test TURNTARGS=-v)	4m 2s
rust-ci (bril-rs/bril2json/Cargo.toml)	1m 17s
test (cd brilift && cargo build --release && make rt.o && make benchmark TURNTARGS=-v)	4m 43s
rust-ci (bril-rs/brild/Cargo.toml)	1m 18s
rust-ci (brilift/Cargo.toml)	1m 10s
rust-ci (bril-rs/rs2bril/Cargo.toml)	36s
rust-ci (bril-rs/brillvm/Cargo.toml)	2m 44s
	30m 29s

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