  
  
  # Models for nullable FK tests
  
  @python_2_unicode_compatible
  class Employee(models.Model):
      name = models.CharField(max_length=50)
      boss = models.ForeignKey('self', models.SET_NULL, null=True, related_name='serfs')
  
      def __str__(self):
 
</s> remove @python_2_unicode_compatible
 </s> add  </s> remove @python_2_unicode_compatible
 </s> add  </s> remove @python_2_unicode_compatible
 </s> add  </s> remove @python_2_unicode_compatible
 </s> add  </s> remove @python_2_unicode_compatible
 </s> add 
  
  
  # Models for nullable FK tests
  

  class Employee(models.Model):
      name = models.CharField(max_length=50)
      boss = models.ForeignKey('self', models.SET_NULL, null=True, related_name='serfs')
  
      def __str__(self):
keep keep keep keep replace keep keep keep keep keep
 Refs #23919 -- Removed python_2_unicode_compatible decorator usage 
tests/prefetch_related/models.py