{"ast_node_type":"other","tokens":[{"end":75,"kind":"keyword","start":0,"text":"(FnTrait::AsyncFnMut,"}]}
            (FnTrait::AsyncFnMut, sym::CallRefFuture, &[FnTrait::AsyncFn]),
            (FnTrait::FnOnce, sym::Output, &[FnTrait::Fn, FnTrait::FnMut][..]),
            (FnTrait::AsyncFnOnce, sym::CallOnceFuture, &[]),