{"ast_node_type":"other","tokens":[{"end":136,"kind":"keyword","start":0,"text":"AsyncFn,"}]}
    AsyncFn,                 sym::async_fn,            async_fn_trait,             Target::Trait,          GenericRequirement::Exact(1);
    AsyncFnMut,              sym::async_fn_mut,        async_fn_mut_trait,         Target::Trait,          GenericRequirement::Exact(1);