{"ast_node_type":"other","tokens":[{"end":61,"kind":"keyword","start":0,"text":"(FnTrait::AsyncFnOnce,"}]}
            (FnTrait::AsyncFnOnce, sym::CallOnceFuture, &[]),
            (FnTrait::AsyncFnMut, sym::CallRefFuture, &[FnTrait::AsyncFn]),
        ] {