{"ast_node_type":"other","tokens":[{"end":81,"kind":"keyword","start":0,"text":"//"}]}
        // we can have a `ClosureSignature { Coroutine { .. }, Closure { .. } }`,
        // instead of having a `FnSig` and a `Option<CoroutineTypes>`,
        // similar to how `ty::GenSig` is a distinct data structure.