{"ast_node_type":"other","tokens":[{"end":52,"kind":"keyword","start":0,"text":"DeclarativeMacro(Arc<DeclarativeMacroExpander>),"}]}
    DeclarativeMacro(Arc<DeclarativeMacroExpander>),
    /// Old-style `macro_rules` or the new macros 2.0
    /// Stuff like `line!` and `file!`.