text: from django.db.models import Manager
  from django.db.models.query import QuerySet
  
  
  class SponsorQuerySet(QuerySet):
      def draft(self):
          return self.filter(is_published=False)
  
      def published(self):
          return self.filter(is_published=True)
  
  
  class SponsorManager(Manager):
      def get_query_set(self):
          return SponsorQuerySet(self.model, using=self._db)
  
      def draft(self):
          return self.get_query_set().draft()
  
      def published(self):
          return self.get_query_set().published()
  