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
*            handle array
	 * @return if exists
	 */
	public static boolean checkContainerExists( Object content, Object[] handles )
	{
		content = unwrapToModel( content );
		DesignElementHandle child = null;
		if ( content instanceof SlotHandle )
		{
			child = ( (SlotHandle) content ).getElementHandle( );
		}
		else if ( content instanceof DesignElementHandle )
		{
			child = (DesignElementHandle) content;
		}
		if ( child != null )
		{
			for ( int i = 0; i < handles.length; i++ )
			{
				if ( content == handles[i] )
				{
					continue;
				}
				
				if ( child == handles[i] )
				{
					return true;
				}
				if ( handles[i] instanceof DesignElementHandle )
				{