Bug 194843 Cross tab Cube - Cannot delete a dimension using the cube builder
- Open the attached report design - Delete the "Region" group. Current behavior - Does now allow me to delete the group.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/command/ContentCommand.java
*/
	protected void checkBeforeAdd( DesignElement content )
			throws ContentException, NameException
	{
		assert content.getContainer( ) == null;
		super.checkBeforeAdd( content );
		
		
		if ( element.isVirtualElement( ) || element.getExtendsName( ) != null )
			throw ContentExceptionFactory
					.createContentException(
							focus,
							content,
							ContentException.DESIGN_EXCEPTION_STRUCTURE_CHANGE_FORBIDDEN );
		if ( focus.getSlotID( ) == IModuleModel.COMPONENT_SLOT )
		{
			if ( StringUtil.isBlank( content.getName( ) ) )
				throw ContentExceptionFactory
						.createContentException(
								focus,
								content,
								ContentException.DESIGN_EXCEPTION_CONTENT_NAME_REQUIRED );
		}
		checkContainmentContext( content );
	}
	protected void doAdd( int newPos, DesignElement content )
			throws ContentException, NameException
	{
		
		ContentRecord addRecord;