old_contents: class CountryFilterMixin():
    def filter_by_country(self, request, query_set, address_param):
      if request.user.is_superuser:
        return query_set
  
      user_groups = request.user.groups.all()
      if len(user_groups) == 0:
        return query_set.filter(owner=user)
  
      user_contries = []
      for group in user_groups:
        if group.name.startswith('mng-'):
          user_contries.append(group.name.split('-')[1].upper())
  
      if len(user_contries) == 0:
        return query_set.filter(owner=user)
  
      filter_params = {}
  
      filter_params[address_param + '__address_components__short_name__in'] = user_contries
      filter_params[address_param + '__address_components__types__name__exact'] = 'country'
  
      return query_set.filter(**filter_params)
  
new_contents: class CountryFilterMixin():
    def filter_by_country(self, request, query_set, address_param):
      if request.user.is_superuser:
        return query_set
  
      user_groups = request.user.groups.all()
      if len(user_groups) == 0:
        return query_set.filter(owner=user)
  
      user_countries = []
      for group in user_groups:
        if group.name.startswith('mng-'):
          user_countries.append(group.name.split('-')[1].upper())
  
      if len(user_countries) == 0:
        return query_set.filter(owner=user)
  
      filter_params = {}
  
      filter_params[address_param + '__address_components__short_name__in'] = user_countries
      filter_params[address_param + '__address_components__types__name__exact'] = 'country'
  
      return query_set.filter(**filter_params)
  
subject: Fix typo