container.setLayout( WidgetUtil.createGridLayout( 1 ) );
container.setLayout( WidgetUtil.createGridLayout( 1 ,15) );
	public void buildUI( Composite parent  )	{		super.buildUI( parent );		container.setLayout( WidgetUtil.createGridLayout( 1 ) );		// Defines provider.		IDescriptorProvider expressionProvider = new ExpressionPropertyDescriptorProvider( TextDataHandle.VALUE_EXPR_PROP,				ReportDesignConstants.TEXT_DATA_ITEM );		// Defines section.		ExpressionSection expressionSection = new ExpressionSection( expressionProvider.getDisplayName( ),				container,				true );		expressionSection.setProvider( expressionProvider );		expressionSection.setWidth( 500 );		// Adds section into this page.		addSection( PageSectionId.EXPRESSION_VALUE_EXPR, expressionSection ); //$NON-NLS-1$		createSections( );		layoutSections( );	}