Bug 417317 Error when running chart example SwingInteractivityViewer.java.
chart/org.eclipse.birt.chart.engine/src/org/eclipse/birt/chart/render/InteractiveRenderer.java
{
			saveLine( lineAttributes );
			lineAttributes.setVisible( false );
		}
		Label label = event.getLabel( );
		if ( label != null )
		{
			saveLabel( label );
			label.setVisible( false );
		}
	}
	private void hideFill( Fill fill )
	{
		if ( fill instanceof ColorDefinition )
		{
			( (ColorDefinition) fill ).setTransparency( 0 );
		}
		else if ( fill instanceof Gradient )
		{
			( (Gradient) fill ).setTransparency( 0 );
		}
		else if ( fill instanceof Image )
		{
			
		}
		else if ( fill instanceof MultipleFill )
		{
			EList<Fill> list = ( (MultipleFill) fill ).getFills( );
			for ( int i = 0; i < list.size( ); i++ )
			{