model_config = {"arbitrary_types_allowed": True}

        a_uuid: MyUuid

        @field_serializer("a_uuid")
        def serialize_a_uuid(self, v):
            return str(v)

    @app.get("/get_custom_class")
    def return_some_user():
        # Test that the fix also works for custom pydantic classes
        return SomeCustomClass(a_uuid=MyUuid("b8799909-f914-42de-91bc-95c819218d01"))

    client = TestClient(app)

  local myuuid
  if grep -q "${device}" "${ssdmap}"; then
    #create symlink based on saved uuid
    myuuid=$(grep "${device}" "${ssdmap}" | cut -d ' ' -f 2)
  else
    # generate new uuid and add it to the map
    if ! myuuid=$(uuidgen); then
      echo "Failed to generate valid UUID with uuidgen" >&2
      exit 2
    fi
    echo "${device} ${myuuid}" >> "${ssdmap}"
  fi

		storage.SimpleUpdate(func(obj runtime.Object) (runtime.Object, error) {
			pod := obj.(*example.Pod)
			pod.ObjectMeta.UID = "myUID"
			return pod, nil
		}), nil); err != nil {
		t.Errorf("Unexpected failure during updated: %v", err)
	}

	prec := storage.NewUIDPreconditions("myUID")

	out := &example.Pod{}
	if err := store.Delete(ctx, key, out, prec, storage.ValidateAllObjectFunc, originalPod); err != nil {

func verifyGraphInvariants(scenario string, uidToNode map[types.UID]*node, t *testing.T) {
	for myUID, node := range uidToNode {
		for dependentNode := range node.dependents {
			found := false
			for _, owner := range dependentNode.owners {
				if owner.UID == myUID {
					found = true
					break
				}
			}
			if !found {