Bug 167545 Copy a cascading parameter group and paste it to another parameter group causes an exception thrown
Steps to reproduce: 1.Copy a cascading parameter group using short cut key "Ctrl+x"/"Ctrl+c", or choosing context menu "Cut"/"Copy"; 2.Paste it to another parameter group using short cut key "Ctrl+v", or choosing context menu "Paste"; Expected result: The source one is pasted in the destination. Actual result: An exception thrown org.eclipse.birt.report.model.api.command.ContentException: The Cascading Parameter Group("Source") is not allowed in the slot (parameters) of Parameter Group("Destination").
UI/org.eclipse.birt.report.designer.core/src/org/eclipse/birt/report/designer/util/DEUtil.java
public static List getVisiableColumnBindingsList( DesignElementHandle handle )
	{
		return getVisiableColumnBindingsList( handle, true );
	}
	/**
	 * Returns all visible column bindings for the given element
	 * 
	 * @param handle
	 *            the handle of the element
	 * @return the list of all visible column bindings.The list order is from
	 *         the top to the given element
	 */
	public static List getVisiableColumnBindingsList(
			DesignElementHandle handle, boolean includeSelf )
	{
		List bindingList = new ArrayList( );
		if ( includeSelf )
		{
			Iterator iterator = getBindingColumnIterator( handle );
			while ( iterator.hasNext( ) )
			{
				bindingList.add( iterator.next( ) );
			}
		}
		ReportItemHandle holder = getBindingHolder( handle );
		if ( holder != null )
		{
			for ( DesignElementHandle elementHandle = handle.getContainer( ); elementHandle != holder.getContainer( ); elementHandle = elementHandle.getContainer( ) )
			{
				List subBindingList = new ArrayList( );