Bug 129144 Support suppressDuplicates property on table row in report engine
See 129143 for detail. This only needs to be supported for data item in a detail row of a table.
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/ir/IReportItemVisitor.java
*            the grid to be visited
	 */
	Object visitGridItem(GridItemDesign grid, Object value);
	/**
	 * visit table item
	 * 
	 * @param table
	 *            the table item to be visited
	 */
	Object visitTableItem(TableItemDesign table, Object value);
	
	Object visitRow(RowDesign row, Object value);
	
	Object visitCell(CellDesign cell, Object value);
	/**
	 * visit image item.
	 * 
	 * @param image
	 *            the image item to be visited.
	 */
	Object visitImageItem(ImageItemDesign image, Object value);
	/**
	 * visit extended item
	 * 
	 * @param item
	 *            the extended item to be visited
	 */
	Object visitExtendedItem(ExtendedItemDesign item, Object value);
}