docs: private Map<String, StatsSnapshot> getStatsSnapshots(boolean isReceived) {
      SortedMap<String, StatsSnapshot> map = Maps.newTreeMap(); // Sorted by method name.
      if (isReceived) {
        getStatsSnapshots(map, SERVER_RPC_CUMULATIVE_VIEWS);
        getStatsSnapshots(map, SERVER_RPC_MINUTE_VIEWS);
        getStatsSnapshots(map, SERVER_RPC_HOUR_VIEWS);
      } else {
        getStatsSnapshots(map, CLIENT_RPC_CUMULATIVE_VIEWS);
        getStatsSnapshots(map, CLIENT_RPC_MINUTE_VIEWS);
        getStatsSnapshots(map, CLIENT_RPC_HOUR_VIEWS);
      }
      return map;
    }