syntax_data: {"ast_node_type":"function","tokens":[{"end":45,"kind":"keyword","start":0,"text":"fn"}]}
source_snippet:     fn split(self) -> CoroutineArgsParts<I> {
context_before:     /// The ordering assumed here must match that used by `CoroutineArgs::new` above.
context_after:         self.args.split_coroutine_args()