{"ast_node_type":"other","tokens":[{"end":62,"kind":"keyword","start":0,"text":"Some(Desugared(AsyncGen,"}]}
        Some(Desugared(AsyncGen, Block)) => "async_gen_block",
        Some(Desugared(Async, Fn)) => "async_fn",
        Some(Desugared(AsyncGen, Closure)) => "async_gen_closure",