Bug 183888 BIRT designer - Cube in data explorer
Current behavior - The data explorer view allows uer to change the order of a group level in a hierrachy. Expected behavior - user should not be allowed to change the order of the group level in data explorer view. - Instead user can user cube builder dialog to change the order.
UI/org.eclipse.birt.report.designer.core/src/org/eclipse/birt/report/designer/util/DNDUtil.java
}
	/**
	 * Adds new object to container
	 * 
	 * @param container
	 *            container, not null
	 * @param handle
	 *            new object. If new object is null, create nothing
	 * @throws SemanticException
	 */
	public static void addElementHandle( Object container,
			DesignElementHandle handle ) throws SemanticException
	{
		assert ( container != null );
		if ( handle == null )
		{
			return;
		}
		container = unwrapToModel( container );
		if ( container instanceof DesignElementHandle )
		{
			( (DesignElementHandle) container ).addElement( handle,
					DEUtil.getDefaultSlotID( container ) );
		}
		else if ( container instanceof SlotHandle )
		{
			( (SlotHandle) container ).add( handle );
		}
	}
	public static void addEmbeddedImageHandle( Object container,