code: protected boolean removeLayer(Layer layer) {
  		int index = getLayerIndex(layer);
  		if (index >= 0) {
  			//contentPanel.remove(index);
  			view.removeWidget(index);
  
  			return true;
  		}
  		return false;
  	}
docs: Remove a layer from the drop down content panel again.
  
  @param layer
  The layer to remove.
  @return success or not.