40  * This class keeps track of the timestamps at which the shutdown
58      * Loads any saved timestamps
66      * @brief Adds an entry to the timestamps map and persists it.
76         auto result = timestamps.emplace(key, timestamp);  in add()
90         size_t removed = timestamps.erase(key);  in erase()
102         timestamps.erase(entry);  in erase()
111         if (!timestamps.empty())  in clear()
113             timestamps.clear();  in clear()
129         auto size = timestamps.size();  in prune()
144         auto it = timestamps.begin();  in prune()
146         while (it != timestamps.end())  in prune()
150                 it = timestamps.erase(it);  in prune()
158         if (size != timestamps.size())  in prune()
165      * @brief Returns the timestamps map
169         return timestamps;  in get()
173      * @brief Saves the timestamps map in the filesystem using cereal.
191         for (const auto& [key, time] : timestamps)  in save()
209      * @brief Loads the saved timestamps from the filesystem.
235                 timestamps.emplace(  in load()
254     std::map<AlarmKey, uint64_t> timestamps;  member in sensor::monitor::AlarmTimestamps