Bug 184762 BIRT Model - Enhancments to the level defintion
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/writer/ModuleWriter.java
property( obj, ILevelModel.DATA_TYPE_PROP );
		property( obj, ILevelModel.DATE_TIME_LEVEL_TYPE );
		property( obj, ILevelModel.INTERVAL_BASE_PROP );
		property( obj, ILevelModel.INTERVAL_PROP );
		property( obj, ILevelModel.INTERVAL_RANGE_PROP );
		property( obj, ILevelModel.LEVEL_TYPE_PROP );
		writeStructureList( obj, ILevelModel.STATIC_VALUES_PROP );
		writeStructureList( obj, ILevelModel.ATTRIBUTES_PROP );
		writeContents( obj, ILevelModel.VALUE_ACCESS_CONTROLS_PROP );
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.birt.report.model.elements.ElementVisitor#visitMeasureGroup(org.eclipse.birt.report.model.elements.olap.MeasureGroup)
	 */
	public void visitMeasureGroup( MeasureGroup obj )
	{
		super.visitMeasureGroup( obj );
		writeContents( obj, IMeasureGroupModel.MEASURES_PROP );
		writeOverridenPropertyValues( obj );
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.birt.report.model.elements.ElementVisitor#visitMeasure(org.eclipse.birt.report.model.elements.olap.Measure)
	 */
	public void visitMeasure( Measure obj )
	{
		super.visitMeasure( obj );
		property( obj, IMeasureModel.FUNCTION_PROP );