Cargo Features

simple_hll has no features set by default.

[dependencies]
simple_hll = { version = "0.0.3", features = ["serde_borsh"] }
serde_borsh = borsh, serde

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.

serde serde_borsh?
borsh serde_borsh?