Cargo Features

[dependencies]
tokio-metrics-collector = { version = "0.2.3", default-features = false, features = ["rt"] }
default = rt

The rt feature is set by default whenever tokio-metrics-collector is added without default-features = false somewhere in the dependency tree.

rt default = tokio

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.

tokio rt