/** @brief AuctionsManager is a singleton, there should only be one in the system. */
  private AuctionsManager() {
    //  This should be loaded from the configuration settings.
    mCheckpointFrequency = 10 * Constants.ONE_MINUTE;
    mLastCheckpointed = System.currentTimeMillis();

    mFilter = FilterManager.getInstance();
  }
 /**
  * @brief Return an iterator useful for iterating over all the auction lists managed.
  * @return An iterator pointing to the first auction list.
  */
 public static Iterator<AuctionEntry> getAuctionIterator() {
   return FilterManager.getInstance().getAuctionIterator();
 }