Bug 211703 Support muti-view on report item.
As title described.
xtab/org.eclipse.birt.report.item.crosstab.core/src/org/eclipse/birt/report/item/crosstab/core/de/CrosstabReportItemHandle.java
* 
	 * @param cube
	 * @throws SemanticException
	 */
	public void setCube( CubeHandle cube ) throws SemanticException
	{
		handle.setProperty( IReportItemModel.CUBE_PROP, cube );
	}
	/**
	 * Gets the name of referred OLAP cube element.
	 * 
	 * @return name of the referred OLAP cube element.
	 */
	public String getCubeName( )
	{
		return handle.getStringProperty( IReportItemModel.CUBE_PROP );
	}
	/**
	 * Finds a dimension view that refers a cube dimension element with the
	 * given name.
	 * 
	 * @param name
	 *            name of the cube dimension element to find
	 * @return dimension view if found, otherwise null
	 */
	public DimensionViewHandle getDimension( String name )
	{
		DimensionViewHandle dimensionView = findDimension( ROW_AXIS_TYPE, name );;
		if ( dimensionView != null )
			return dimensionView;