if (!(child.getModel( ) instanceof DesignElementHandle)) { return UnexecutableCommand.INSTANCE; }
	private Command createAddCommand( EditPart parent, EditPart child,			EditPart insertionReference )	{		Object parentModel = null;		if ( parent.getModel( ) instanceof ListBandProxy )		{			parentModel = ( (ListBandProxy) parent.getModel( ) ).getSlotHandle( );		}		else		{			parentModel = parent.getModel( );		}		return new PasteCommand( (DesignElementHandle) child.getModel( ),				parentModel,				insertionReference == null ? null						: (DesignElementHandle) insertionReference.getModel( ),				false );	}