Bug 183918 get relative file path of linkage library
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/command/ComplexPropertyCommand.java
ActivityStack stack = module.getActivityStack( );
		stack.startTrans( label );
		makeLocalCompositeValue( prop );
		List list = element.getListProperty( module, prop.getName( ) );
		assert list != null;
		SimplePropertyListRecord record = new SimplePropertyListRecord(
				element, prop, list, posn );
		record.setEventTarget( getEventTarget( prop ) );
		stack.execute( record );
		if ( item instanceof ElementRefValue )
		{
			ElementRefValue refValue = (ElementRefValue) item;
			if ( refValue.isResolved( ) )
			{
				ElementRefRecord refRecord = new ElementRefRecord( element,
						refValue.getTargetElement( ), prop.getName( ), false );
				stack.execute( refRecord );
			}
		}
		stack.commit( );
	}
	/**
	 * Removes item from a simple value list.
	 * 
	 * @param structRef
	 *            reference to the item to remove
	 */
	private void doRemoveItem( MemberRef ref, PropertyDefn propDefn, int posn )
			throws PropertyValueException
	{