code: public final SelectionLayer getSelectionLayer()
      {
          if (isListening())
          {
              if (null == m_select)
              {
                  m_select = new SelectionLayer();
  
                  m_select.setPixelSize(getWidth(), getHeight());
              }
              return m_select;
          }
          return null;
      }
docs: Returns the Selection Layer.
  
  @return {@link SelectionLayer}