Cargo Features

WeightCache has no features set by default.

[dependencies]
weight-cache = { version = "0.2.3", features = ["metrics"] }
metrics = prometheus

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.

prometheus metrics?

Enables prometheus ^0.12.0