Cargo Features

gtk4_macros has no features set by default.

[dependencies]
gtk4-macros = { version = "0.8.0", features = ["xml_validation", "blueprint"] }
xml_validation = quick-xml
blueprint

Affects gtk4-macros::include_blueprint

Features from optional dependencies

In crates that don't use the dep: syntax, optional dependencies automatically become Cargo features.

quick-xml xml_validation?