code: public void init(ListenerOwner owner)
      {
          m_owner = owner;
          m_nextListener = null;
          m_bEnabled = true;
          m_dependentListener = null;
          m_dependentStateListener = null;
          if (owner != null)
              owner.addListener(this);
      }
docs: Constructor.
  @param owner My owner (usually passed as null, and set on addListener in setOwner()).