Averages avgs = (Averages) table.get (key); if (avgs == null) return 0.0f;
RunningAverage commRTT = (RunningAverage) table.get (key); if (commRTT == null) return 0.0f;
  private float theCommRTTPercentFilled (String sendLink, String node, String receiveLink)  {    synchronized (roundtripTable)    {      String key = sendLink +"-"+ node;      Hashtable table = (Hashtable) roundtripTable.get (key);      if (table == null) return 0.0f;      key = receiveLink;      Averages avgs = (Averages) table.get (key);      if (avgs == null) return 0.0f;      return avgs.commRTT.percentFilled();    }  }