Bug 120293 There is no response when I drag an embedded image from library explorer into outline view.
Description: There is no response when I drag an embedded image from library explorer into outline view. Steps to reproduce: 1. Use a library in a report. 2. Drag an embedded image from library explorer into outline view. There is no response. It doesn't take effect.
UI/org.eclipse.birt.report.designer.core/src/org/eclipse/birt/report/designer/util/DNDUtil.java
*/
	public static DesignElementHandle getDesignElementHandle( Object target )
	{
		target = unwrapToModel( target );
		if ( target instanceof DesignElementHandle )
		{
			return (DesignElementHandle) target;
		}
		else if ( target instanceof SlotHandle )
		{
			return ( (SlotHandle) target ).getElementHandle( );
		}
		return null;
	}
	/**
	 * Unwraps the object to model
	 * 
	 * @param obj
	 *            object which may be wrapped, such as
	 *            <code>ReportElementModel</code>, <code>ListBandProxy</code>
	 * @return model object
	 */
	public static Object unwrapToModel( Object obj )
	{
		if ( obj instanceof ReportElementModel )
		{
			return ( (ReportElementModel) obj ).getSlotHandle( );
		}
		if ( obj instanceof ListBandProxy )
		{