code: protected void doRemovePageComponent( PageComponent pageComponent ) {
          if (pageComponent == getActiveComponent())
          {
  	    	this.control.removeAll();
  	        this.control.validate();
  	        this.control.repaint();
          }
      }
docs: {@inheritDoc}
  
  Only one pageComponent is shown at a time, so if it's the active one,
  remove all components from this page.