{"ast_node_type":"other","tokens":[{"end":132,"kind":"keyword","start":0,"text":"AsyncFnOnceOutput,"}]}
    AsyncFnOnceOutput,       sym::async_fn_once_output,async_fn_once_output,       Target::AssocTy,        GenericRequirement::None;
    FnOnceOutput,            sym::fn_once_output,      fn_once_output,             Target::AssocTy,        GenericRequirement::None;