{"ast_node_type":"other","tokens":[{"end":28,"kind":"keyword","start":0,"text":"assert_matches!("}]}
            assert_matches!(
        if let DefiningTy::CoroutineClosure(_, args) = self.universal_regions.defining_ty {
                self.tcx().coroutine_kind(self.tcx().coroutine_for_closure(mir_def_id)),