{"ast_node_type":"other","tokens":[{"end":97,"kind":"keyword","start":0,"text":"impl<T1:"}]}
impl<T1: StableOrd, T2: StableOrd, T3: StableOrd, T4: StableOrd> StableOrd for (T1, T2, T3, T4) {
    const CAN_USE_UNSTABLE_SORT: bool = T1::CAN_USE_UNSTABLE_SORT