Cargo Features
merkle-sha3 has no features set by default.
[dependencies]
merkle-sha3 = { version = "0.1.0", features = ["serialization-protobuf"] }- serialization-protobuf = protobuf
Features from optional dependencies
In crates that don't use the dep: syntax, optional dependencies automatically become Cargo features. These features may have been created by mistake, and this functionality may be removed in the future.