              return queryset
          backend = self.filter_backend()
          return backend.filter_queryset(self.request, queryset, self)
  
      ### The following methods provide default implementations
      ### that you may want to override for more complex cases.
  
      def get_serializer_class(self):
          """
          Return the class to use for the serializer.
 
</s> remove     ### The following methods are intended to be overridden.
 </s> add     ########################
    ### The following are placeholder methods,
    ### and are intended to be overridden. </s> remove     pk_url_kwarg = 'pk'  # Not provided in Django 1.3
    slug_url_kwarg = 'slug'  # Not provided in Django 1.3
 </s> add     pk_url_kwarg = 'pk'
    slug_url_kwarg = 'slug'
    ########################
              return queryset
          backend = self.filter_backend()
          return backend.filter_queryset(self.request, queryset, self)
  
    ########################
      ### The following methods provide default implementations
      ### that you may want to override for more complex cases.
  
      def get_serializer_class(self):
          """
          Return the class to use for the serializer.
keep keep keep add keep keep keep keep keep keep
 Cleaning up around bits of API that will be pending deprecation 
rest_framework/generics.py