docs: def perform_get_or_create(self, request, *args, **kwargs):
          """Perform "get_or_create" - return existing object if found."""
          serializer = self.get_serializer(data=request.data)
          serializer.is_valid(raise_exception=True)
          process = serializer.validated_data.get('process')
          process_input = request.data.get('input', {})
  
          fill_with_defaults(process_input, process.input_schema)
  
          checksum = get_data_checksum(process_input, process.slug, process.version)
          data_qs = Data.objects.filter(
              checksum=checksum,
              process__persistence__in=[Process.PERSISTENCE_CACHED, Process.PERSISTENCE_TEMP],
          )
          data_qs = get_objects_for_user(request.user, 'view_data', data_qs)
          if data_qs.exists():
              data = data_qs.order_by('created').last()
              serializer = self.get_serializer(data)
              return Response(serializer.data)