{"ast_node_type":"other","tokens":[{"end":99,"kind":"keyword","start":0,"text":"fcx_typeck_results.user_provided_sigs.items().map(|(def_id,"}]}
            fcx_typeck_results.user_provided_sigs.items().map(|(def_id, c_sig)| (*def_id, *c_sig)),
        self.typeck_results.user_provided_sigs.extend_unord(
        );