Bug 176450 Support link to CSS Feature(Model Part)
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/command/ComplexPropertyCommand.java
*/
	public void addItem( MemberRef ref, Object item ) throws SemanticException
	{
		assert ref != null;
		if ( item == null )
			return;
		
		assert !( item instanceof IStructure );
		ElementPropertyDefn prop = ref.getPropDefn( );
		PropertyDefn memberDefn = ref.getMemberDefn( );
		assertExtendedElement( module, element, prop );
		
		checkListProperty( memberDefn );
		Object value = checkItem( memberDefn, item );
		ActivityStack stack = getActivityStack( );
		stack.startTrans( ModelMessages
				.getMessage( MessageConstants.ADD_ITEM_MESSAGE ) );
		makeLocalCompositeValue( ref );
		List list = (List) ref.getValue( module, element );
		if ( null == list )
		{
			list = new ArrayList( );
			MemberRecord memberRecord = new MemberRecord( module, element, ref,
					list );
			stack.execute( memberRecord );
		}
		SimplePropertyListRecord record = new SimplePropertyListRecord(
				element, prop, list, value, list.size( ) );
		record.setEventTarget( getEventTarget( ref.getPropDefn( ) ) );
		stack.execute( record );