{"ast_node_type":"other","tokens":[{"end":68,"kind":"keyword","start":0,"text":"tt::TopSubtree::empty(tt::DelimSpan::from_single(span)),"}]}
            tt::TopSubtree::empty(tt::DelimSpan::from_single(span)),
        return ExpandResult::new(
            ExpandError::other(span, "`CoercePointee` can only be derived on `struct`s"),