{"ast_node_type":"other","tokens":[{"end":86,"kind":"keyword","start":0,"text":"//"}]}
            // "coroutine that returns &str", rather than directly returning a `&str`.
            // knows that a `FnDecl` output type like `-> &str` actually means
            kind: hir::ClosureKind::CoroutineClosure(coroutine_desugaring),