{"ast_node_type":"function","tokens":[{"end":82,"kind":"keyword","start":0,"text":"$(fn"}]}
            $(fn $make_ast(self: Box<crate::mbe::macro_rules::ParserAnyMacro<'a>>)
        impl<'a> MacResult for crate::mbe::macro_rules::ParserAnyMacro<'a> {
                           -> Option<$AstTy> {