          except model.DoesNotExist:
              raise ErrorResponse(status.HTTP_404_NOT_FOUND, None, {})
  
          instance.delete()
          return
  
  
  class ListModelMixin(ModelMixin):
      """
      Behavior to list a set of `model` instances on GET requests
 
</s> remove             raise ErrorResponse(status.HTTP_404_NOT_FOUND, None, {})
 </s> add             raise ErrorResponse(status=status.HTTP_404_NOT_FOUND) </s> remove         return self.model_instance
 </s> add         return Response(self.model_instance) </s> remove             headers['Location'] = self.resource(self).url(instance)
        return Response(status.HTTP_201_CREATED, instance, headers)
 </s> add             response['Location'] = self.resource(self).url(instance)
        return response </s> remove             raise ErrorResponse(status.HTTP_404_NOT_FOUND)
 </s> add             raise ErrorResponse(status=status.HTTP_404_NOT_FOUND)
        return Response()
          except model.DoesNotExist:
              raise ErrorResponse(status.HTTP_404_NOT_FOUND, None, {})
  
          instance.delete()
        return Response()
  
  
  class ListModelMixin(ModelMixin):
      """
      Behavior to list a set of `model` instances on GET requests
keep keep keep keep replace keep keep keep keep keep
 Response as a subclass of HttpResponse - first draft, not quite there yet. 
djangorestframework/mixins.py