{"ast_node_type":"other","tokens":[{"end":43,"kind":"keyword","start":0,"text":"FnTrait::Fn"}]}
            FnTrait::Fn => write!(f, "Fn"),
            FnTrait::FnMut => write!(f, "FnMut"),
            FnTrait::AsyncFnOnce => write!(f, "AsyncFnOnce"),