{"ast_node_type":"other","tokens":[{"end":63,"kind":"keyword","start":0,"text":"attr(r#\"must_use\"#,"}]}
    attr(r#"must_use"#, Some("must_use"), Some(r#"must_use"#)),
    attr("macro_use", None, None),
    attr("no_implicit_prelude", None, None).prefer_inner(),