  
  from rest_framework import serializers
  from tests.models import (
      ForeignKeySource, ForeignKeyTarget, ManyToManySource, ManyToManyTarget,
      NullableForeignKeySource, NullableOneToOneSource, NullableUUIDForeignKeySource,
      OneToOnePKSource, OneToOneTarget, UUIDForeignKeyTarget
  )
  
  
  # ManyToMany
  class ManyToManyTargetSerializer(serializers.ModelSerializer):
 
</s> remove from rest_framework.compat import ResolverMatch, guardian, set_many
 </s> add from rest_framework.compat import ResolverMatch, guardian </s> remove     BaseAuthentication, BasicAuthentication, RemoteUserAuthentication, SessionAuthentication,
    TokenAuthentication)
 </s> add     BaseAuthentication, BasicAuthentication, RemoteUserAuthentication,
    SessionAuthentication, TokenAuthentication
) </s> remove from rest_framework.compat import set_many
 </s> add  </s> remove from rest_framework.compat import set_many, unicode_repr
 </s> add from rest_framework.compat import unicode_repr </s> remove     pygments_css, template_render
 </s> add     pygments_css
    NullableForeignKeySource, NullableOneToOneSource,
    NullableUUIDForeignKeySource, OneToOnePKSource, OneToOneTarget,
    UUIDForeignKeyTarget
  
  from rest_framework import serializers
  from tests.models import (
      ForeignKeySource, ForeignKeyTarget, ManyToManySource, ManyToManyTarget,
    NullableForeignKeySource, NullableOneToOneSource,
    NullableUUIDForeignKeySource, OneToOnePKSource, OneToOneTarget,
    UUIDForeignKeyTarget
    NullableForeignKeySource, NullableOneToOneSource,
    NullableUUIDForeignKeySource, OneToOnePKSource, OneToOneTarget,
    UUIDForeignKeyTarget
  )
  
  
  # ManyToMany
  class ManyToManyTargetSerializer(serializers.ModelSerializer):
keep keep keep keep replace replace keep keep keep keep keep
 Remove Django 1.8 & 1.9 compatibility code (#5481)

* Identify code that needs to be pulled out of/removed from compat.py

* Extract modern code from get_names_and_managers in compat.py and remove compat code

* Extract modern code from is_authenticated() in compat.py and remove.

* Extract modern code from is_anonymous() in compat.py and remove

* Extract modern code from get_related_model() from compat.py and remove

* Extract modern code from value_from_object() in compat.py and remove

* Update postgres compat

JSONField now always available.

* Remove DecimalValidator compat

* Remove get_remote_field compat

* Remove template_render compat

Plus isort.

* Remove set_many compat

* Remove include compat 
tests/test_relations_pk.py