code: int removeExpired(TimeoutHandler expireHandler)
      {
          // ensure the clock never goes backwards
          long t = ticker.currentTimeMillis();
  
          int expired = 0;
          for (int i = 0; i < slotCount; i++)
          {
              expired += slots[i].removeExpired(t, expireHandler);
          }
          return expired;
      }
docs: Remove expired entries.
  
  @param expireHandler implementation that will be called for each expired entry.