Cargo Features

[dependencies]
apdex = { version = "0.1.1", default-features = false, features = ["yansi"] }
default = yansi

The yansi feature is set by default whenever apdex is added without default-features = false somewhere in the dependency tree.

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.

yansi default

Enables yansi ^0.4.0