Cargo Features

lazy-attribute has no features set by default.

[dependencies]
lazy-attribute = { version = "0.1.4", features = ["async"] }
async = async-once-cell

Enables async of lazy-attribute-core

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.

async-once-cell async?