status_t TransactionCallbackInvoker::findTransactionStats(
        const sp<IBinder>& listener, const std::vector<CallbackId>& callbackIds,
        TransactionStats** outTransactionStats) {
    auto& transactionStatsDeque = mCompletedTransactions[listener];

    // Search back to front because the most recent transactions are at the back of the deque
    auto itr = transactionStatsDeque.rbegin();
    for (; itr != transactionStatsDeque.rend(); itr++) {
        if (compareCallbackIds(itr->callbackIds, callbackIds) == 0) {
            *outTransactionStats = &(*itr);
            return NO_ERROR;
        }
    }

    ALOGE("could not find transaction stats");
    return BAD_VALUE;
}

• 从 mCompletedTransactions 根据 listener 返回 TransactionStats 队列 transactionStatsDeque。
• 遍历 transactionStatsDeque 调用 compareCallbackIds() 判断是否相同。如果相同，设置 outTransactionStats 返回 NO_ERROR。