if ( getChart( ) instanceof ChartWithAxes )
if ( isTrendlineAvailable( ) )
	protected void selectAllButtons( boolean isSelected )	{		btnLabel.setSelection( isSelected );		btnInteractivity.setSelection( isSelected );		btnDataPoint.setSelection( isSelected );		if ( getChart( ) instanceof ChartWithAxes )		{			btnTrendline.setSelection( isSelected );		}	}