docs: def smartformset_factory(form, formset=BaseFormSet, extra=1, can_order=False,
                           can_delete=False, min_num=None, max_num=None, validate_min=False, validate_max=False):
      """Return a FormSet for the given form class."""
      if max_num is None:
          max_num = DEFAULT_MAX_NUM
      # hard limit on forms instantiated, to prevent memory-exhaustion attacks
      # limit is simply max_num + DEFAULT_MAX_NUM (which is 2*DEFAULT_MAX_NUM
      # if max_num is None in the first place)
      absolute_max = max_num + DEFAULT_MAX_NUM
      if min_num is None:
          min_num = 0
  
      attrs = {'form': form, 'extra': extra,
               'can_order': can_order, 'can_delete': can_delete, 'min_num': min_num,
               'max_num': max_num, 'absolute_max': absolute_max, 'validate_min': validate_min,
               'validate_max': validate_max}
      return type(form.__name__ + str('FormSet'), (formset,), attrs)