Bug 188578 Add "displayColumnName" on TabularLevel
Add Property "displayColumnName" on TabbularLevel and corresponding APIs on handle. Property Type: expression.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/writer/ModuleWriter.java
}
			}
		}
		if ( tag != null )
			writer.conditionalStartElement( tag );
		
		
		
		iter = newList.iterator( );
		while ( iter.hasNext( ) )
		{
			( (DesignElement) iter.next( ) ).apply( this );
		}
		if ( tag != null )
			writer.endElement( );
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.birt.report.model.design.elements.DesignVisitor#visitRectangle(org.eclipse.birt.report.model.design.elements.Rectangle)
	 */
	public void visitRectangle( RectangleItem obj )
	{
		writer.startElement( DesignSchemaConstants.RECTANGLE_TAG );
		super.visitRectangle( obj );
		writer.endElement( );
	}
	/*
	 * (non-Javadoc)
	 *