syntax_data: {"ast_node_type":"other","tokens":[{"end":67,"kind":"keyword","start":0,"text":"CoroutineKind::Desugared(CoroutineDesugaring::Gen,"}]}
source_snippet:         CoroutineKind::Desugared(CoroutineDesugaring::Gen, _) => {}
context_before:         // unlike for all other coroutine kinds.
context_after:         _ => {