Cargo Features

async-xml has no features set by default.

[dependencies]
async-xml = { version = "0.2.3", features = ["derive"] }
derive = async-xml-derive

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-xml-derive derive?