Cargo Features

ServoArc has no features set by default.

[dependencies]
servo_arc = { version = "0.3.0", features = ["gecko_refcount_logging", "servo"] }
gecko_refcount_logging
servo = 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 servo?