code: public void setExpiryTime(long pExpiryTime) {
          long oldEexpiryTime = expiryTime;
  
          expiryTime = pExpiryTime;
  
          if (expiryTime < oldEexpiryTime) {
              // Expire now
              nextExpiryTime = 0;
              removeExpiredEntries();
          }
      }
docs: Sets the maximum time any value will be kept in the map, before it expires.
  Removes any items that are older than the specified time.
  
  @param pExpiryTime the expiry time (time to live) for elements in this map