{"ast_node_type":"other","tokens":[{"end":60,"kind":"keyword","start":0,"text":"self.typeck_results.user_provided_sigs.extend_unord("}]}
        self.typeck_results.user_provided_sigs.extend_unord(
            fcx_typeck_results.user_provided_sigs.items().map(|(def_id, c_sig)| (*def_id, *c_sig)),