{"ast_node_type":"other","tokens":[{"end":57,"kind":"keyword","start":0,"text":"group.first_span.get_or_insert(cx.attr_span);"}]}
            group.first_span.get_or_insert(cx.attr_span);
            // Keep track of the span of the first attribute, for diagnostics
            group.items.extend(T::extend(cx, args))