syntax_data: {"ast_node_type":"function","tokens":[{"end":90,"kind":"keyword","start":0,"text":"fn"}]}
source_snippet:     fn iter_enumerated(&self) -> impl '_ + Iterator<Item = (CoroutineSavedLocal, Local)> {
context_before:     /// to.
context_after:         self.iter().enumerate().map(|(i, l)| (CoroutineSavedLocal::from(i), l))