docs: def _update(self, request, *args, **kwargs):
          """Update a resource."""
          partial = kwargs.pop('partial', False)
          # NOTE: The line below was changed.
          instance = self.get_object_with_lock()
          serializer = self.get_serializer(instance, data=request.data, partial=partial)
          serializer.is_valid(raise_exception=True)
          self.perform_update(serializer)
  
          if getattr(instance, '_prefetched_objects_cache', None):
              # If 'prefetch_related' has been applied to a queryset, we need to
              # forcibly invalidate the prefetch cache on the instance.
              instance._prefetched_objects_cache = {}  # pylint: disable=protected-access
  
          return Response(serializer.data)