Bug 181570 Cube should be able to copy, paste and cut [1101]
Description: Cube should be able to copy, paste and cut. Build number: 2.2.0.v20070409-0630 Steps to reproduce: 1. New a Cube. 2. Select Cube, Copy, Pase, Cut should be able use. Expected result: Copy, paste and cut can be used. Actual result: Cube can not be copy paste or cut. Error log: N/A
UI/org.eclipse.birt.report.designer.core/src/org/eclipse/birt/report/designer/util/DNDUtil.java
* Checks whether child's container exists in handle array
	 * 
	 * @param content
	 *            child handle
	 * @param handles
	 *            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] )