this.chart = context.getModel( ); serviceprovider = context.getUIServiceProvider( );
	public AbstractPopupSheet( Composite parent, ChartWizardContext context,			boolean needRefresh )	{		super( );		this.context = context;		this.chart = context.getModel( );		serviceprovider = context.getUIServiceProvider( );		this.needRefresh = needRefresh;	}