if SalesLineBasketOption.objects.filter(line_budget__pk=self.__line_pk).exists():
            self.form_class = LineBasketFormPack
            self.__is_pack = True
        else:
            self.__is_pack = False

def dispatch(self, *args, **kwargs):
        self.__line_pk = kwargs.get('pk', None)
        """
        if SalesLineBasketOption.objects.filter(line_budget__pk=self.__line_pk).exists():
            self.form_class = LineBasketFormPack
            self.__is_pack = True
        else:
            self.__is_pack = False
        """
        return super(LinesUpdateModalBasket, self).dispatch(*args, **kwargs)