ListenerCallbacks ListenerCallbacks::filter(CallbackId::Type type) const {
    std::vector<CallbackId> filteredCallbackIds;
    for (const auto& callbackId : callbackIds) {
        if (callbackId.type == type) {
            filteredCallbackIds.push_back(callbackId);
        }
    }
    return ListenerCallbacks(transactionCompletedListener, filteredCallbackIds);
}

遍历成员 callbackIds，过滤相同 type 的 CallbackId，新建一个 ListenerCallbacks 返回。