{"ast_node_type":"other","tokens":[{"end":71,"kind":"keyword","start":0,"text":"if"}]}
        if matches!(coroutine_kind, hir::CoroutineKind::Coroutine(_)) {
        diag.span_label(yield_span, "possible yield occurs here");
            let hir::Closure { capture_clause, fn_decl_span, .. } = self