Bug 210507 Enhance Report engine to support multiple view
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/ir/EngineIRReader.java
public Object visitReportItem( ReportItemDesign item, Object value )
		{
			linkReportElement( item );
			return value;
		}
		public Object visitRow( RowDesign row, Object value )
		{
			linkReportElement( row );
			int count = row.getCellCount( );
			for ( int i = 0; i < count; i++ )
			{
				CellDesign cell = row.getCell( i );
				cell.accept( this, value );
			}
			return value;
		}		
		public Object visitExtendedItem( ExtendedItemDesign extendedItem,
				Object value )
		{
			linkReportElement( extendedItem );
			List children = extendedItem.getChildren( );
			for ( int i = 0; i < children.size( ); i++ )
			{
				( (ReportItemDesign) children.get( i ) ).accept( this, null );
			}
			return value;
		}
	}
}