{"ast_node_type":"other","tokens":[{"end":57,"kind":"keyword","start":0,"text":")"}]}
    ) -> Option<(DefIdOrName, Ty<'tcx>, Vec<Ty<'tcx>>)> {
        ty: Ty<'tcx>,
        self.err_ctxt().extract_callable_info(self.body_id, self.param_env, ty)