{"ast_node_type":"other","tokens":[{"end":91,"kind":"keyword","start":0,"text":"tt::TopSubtree::empty(tt::DelimSpan"}]}
                tt::TopSubtree::empty(tt::DelimSpan { open: call_site, close: call_site }),
            Self::PROC_MACRO_ATTR_DISABLED => ExpandResult::new(
                ExpandError::new(call_site, ExpandErrorKind::ProcMacroAttrExpansionDisabled),