syntax_data: {"ast_node_type":"other","tokens":[{"end":84,"kind":"keyword","start":0,"text":"hir::CoroutineKind::Desugared(hir::CoroutineDesugaring::Gen,"}]}
source_snippet:                 hir::CoroutineKind::Desugared(hir::CoroutineDesugaring::Gen, _) => {
context_before:             let env_ty = match coroutine_kind {
context_after:                     // Iterator::next doesn't accept a pinned argument,