Bug 176450 Support link to CSS Feature(Model Part)
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/command/ComplexPropertyCommand.java
* Complex property command to handle all list related operations, such as,
 * addItem, removeItem.
 */
public class ComplexPropertyCommand extends AbstractPropertyCommand
{
	/**
	 * Constructor.
	 * 
	 * @param module
	 *            the root of <code>obj</code>
	 * @param obj
	 *            the element to modify.
	 */
	public ComplexPropertyCommand( Module module, DesignElement obj )
	{
		super( module, obj );
	}
	/**
	 * Adds an item to a structure list.
	 * <ul>
	 * <li>If the property is currently unset anywhere up the inheritance
	 * hierarchy, then a new list is created on this element, and the list
	 * contains the only the new item.</li>
	 * <li>If the property is currently set on this element, then the item is
	 * added to the existing list.</li>
	 * <li>If the list is not set on this element, but is set by an ancestor
	 * element, then the list is <strong>copied </strong> onto this element, and
	 * the new element is then appended to the copy.</li>
	 * </ul>
	 *