{"ast_node_type":"function","tokens":[{"end":112,"kind":"keyword","start":0,"text":"fn"}]}
            fn visit_assoc_item(&mut self, item: &$($lt)? $($mut)? AssocItem, ctxt: AssocCtxt) -> Self::Result {
                impl_visitable!(|&$($lt)? $($mut)? self: AssocItem, vis: &mut V, ctxt: AssocCtxt| {