Bug 118750 Insert group for table from library, system throws exception.
Insert group for table from library, system throws exception. Steps: 1.Insert a tabel from library 2.Insert group Actual Results: 1.System throws exception A Birt exception occurred. Plug-in Provider:Eclipse.org Plug-in Name:BIRT Model Plug-in ID:org.eclipse.birt.report.model Version:1.0.1 Error Code:Error.ContentException.STRUCTURE_CHANGE_FORBIDDEN Error Message:Element "report.Body[1]" is child element or a virtual element( inside the child ), can not change its structure. Expected Results: 1.Can be inserted group
UI/org.eclipse.birt.report.designer.core/src/org/eclipse/birt/report/designer/core/model/schematic/TableHandleAdapter.java
* 
	 * @param table
	 *            The handle of report item.
	 * 
	 * @param mark
	 */
	public TableHandleAdapter( ReportItemHandle table, IModelAdapterHelper mark )
	{
		super( table, mark );
	}
	/**
	 * Gets the Children list.
	 * 
	 * @return Children iterator
	 */
	public List getChildren( )
	{
		List children = new ArrayList( );
		SlotHandle header = getTableHandle( ).getHeader( );
		for ( Iterator headerIter = header.iterator( ); headerIter.hasNext( ); )
		{
			children.addAll( ( (RowHandle) headerIter.next( ) ).getCells( )
					.getContents( ) );
		}
		SlotHandle group = getTableHandle( ).getGroups( );
		for ( Iterator groupIter = group.iterator( ); groupIter.hasNext( ); )
		{
			TableGroupHandle tableGroups = (TableGroupHandle) groupIter.next( );
			SlotHandle groupHeaders = tableGroups.getHeader( );
			for ( Iterator groupHeaderIter = groupHeaders.iterator( ); groupHeaderIter.hasNext( ); )