*/
  IntMap        m_byInt = new IntMap();
  HashMap<Integer, IntMap> m_isolateState = new HashMap<Integer, IntMap> ();
  private IntMap getIsolateState(int isolateId) {
    IntMap isolateState = null;
    if (!m_isolateState.containsKey(isolateId)) {
      isolateState = new IntMap();
      m_isolateState.put(isolateId, isolateState);
    }
    else
      isolateState = m_isolateState.get(isolateId);
    return isolateState;