syntax_data: {"ast_node_type":"other","tokens":[{"end":19,"kind":"keyword","start":0,"text":")"}]}
source_snippet:     ) -> Ty<'tcx> {
context_before:         coroutine_args: GenericArgsRef<'tcx>,
context_after:         tcx.debug_assert_args_compatible(def_id, coroutine_args);