syntax_data: {"ast_node_type":"function","tokens":[{"end":78,"kind":"keyword","start":0,"text":"fn"}]}
source_snippet:     fn split_coroutine_closure_args(self) -> ty::CoroutineClosureArgsParts<I>;
context_before:     fn split_closure_args(self) -> ty::ClosureArgsParts<I>;
context_after:     fn split_coroutine_args(self) -> ty::CoroutineArgsParts<I>;