Bug 176450 Support link to CSS Feature(Model Part)
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/api/activity/NotificationEvent.java
* <li>VALIDATION_EVENT</li>
	 * <li>LIBRARY_EVENT</li>
	 * <li>ATTRIBUTE_EVENT</li>
	 * <li>DISPOSE_EVENT</li>
	 * <li>CONTENT_REPLACE_EVENT</li>
	 * <li>TEMPLATE_TRANSFORM_EVENT</li>
	 * </ul>
	 * 
	 * @return the event type.
	 */
	public abstract int getEventType( );
	/**
	 * Compares and justifies whether this event and the given event is the
	 * same.
	 * 
	 * @param event
	 *            the event to compare
	 * @return true if the two events are the same, otherwise false
	 * 
	 */
	public boolean isSame( NotificationEvent event )
	{
		if ( event == null )
			return false;
		if ( event.getEventType( ) != getEventType( )
				|| target != event.getTarget( ) )
			return false;
		return true;
	}
}