Walkability #97

Job	Run time
build-ios (x86_64-apple-ios)	1m 37s
build-ios (aarch64-apple-ios)	1m 36s
test-wasm	1m 35s
test-rust	5m 48s
generate-bindings	2m 42s
build-android (aarch64-linux-android, aarch64-linux-android21-clang, llvm-ar)	1m 54s
build-android (armv7-linux-androideabi, armv7a-linux-androideabi21-clang, llvm-ar)	1m 48s
build-android (x86_64-linux-android, x86_64-linux-android21-clang, llvm-ar)	1m 47s
	18m 47s

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