Cargo Features

[dependencies]
holding = { version = "0.1.0", default-features = false, features = ["sound"] }
default = sound

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

sound default = rspotify

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.

rspotify sound

Enables rspotify ^0.10