{"ast_node_type":"other","tokens":[{"end":49,"kind":"keyword","start":0,"text":"///"}]}
    /// Allows using custom attributes (RFC 572).
    (removed, crate_visibility_modifier, "1.63.0", Some(53120), Some("removed in favor of `pub(crate)`"), 97254),
    (removed, custom_attribute, "1.0.0", Some(29642),