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
}
	}
	/**
	 * Writes out a long text the length of which exceeds 80.
	 * 
	 * @param tag
	 *            the element tag
	 * @param name
	 *            the name attribute
	 * @param value
	 *            the text value
	 */
	protected void writeLongIndentText( String tag, String name, String value )
	{
		writer.startElement( tag );
		if ( name != null )
			writer.attribute( DesignSchemaConstants.NAME_ATTRIB, name );
		writer.indentLongText( value );
		writer.endElement( );
	}
	/**
	 * Writes the property of the given design element.
	 * 
	 * @param obj
	 *            the design element to write
	 * @param tag
	 *            the tag of the write
	 * @param propName
	 *            the property name
	 * @param cdata