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
throw new CrosstabException(
				this.getModelHandle( ).getElement( ),
				Messages
						.getString( "CrosstabReportItemHandle.error.locate.row.cell" ) ); 
	}
	/**
	 * Gets the dimension value handle for the column width where the cell
	 * resides.
	 * 
	 * @param cell
	 *            the cell which the column contains
	 * @return the dimension value handle for the column width where the cell
	 *         resides
	 * @throws CrosstabException
	 */
	public org.eclipse.birt.report.model.api.DimensionHandle getColumnWidth(
			CrosstabCellHandle cell ) throws CrosstabException
	{
		cell = CrosstabModelUtil.locateColumnWidthCell( this, cell );
		if ( cell != null )
		{
			return cell.getWidth( );
		}
		throw new CrosstabException(
				this.getModelHandle( ).getElement( ),
				Messages
						.getString( "CrosstabReportItemHandle.error.locate.column.cell" ) ); 
	}
	/**
	 * Sets the row height where the cell resides.