Bug 153517 The DND of embeddedimage from lib explorer to outline view doesn'w work when the report in outline has used the lib
If the report in outline view has used a library, then drag and drop an embeddedimage of the used library from lib explorer to outline view doesn't work. The DND drop nothing onto the embedded image of the target report. Steps to reproduce: 1.Create a library with an embeddediamge and export to resource folder; 2.Create a new report design; 3.Drag the embeddedimage of lib from lib explorer to outline view;
UI/org.eclipse.birt.report.designer.core/src/org/eclipse/birt/report/designer/util/DNDUtil.java
*            source to drop
	 */
	public static void dropSource( Object source )
	{
		DeleteCommand command = new DeleteCommand( source );
		if ( command.canExecute( ) )
			command.execute( );
	}
	/**
	 * Gets handle of target
	 * 
	 * @param target
	 * @return handle of target
	 */
	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
	 *