return fieldpath.PathElement{}, err
		}
		return fieldpath.PathElement{
			Value: &val,
		}, nil
	case Index:
		i, err := strconv.Atoi(split[1])
		if err != nil {
			return fieldpath.PathElement{}, err
		}
		return fieldpath.PathElement{
			Index: &i,
		}, nil
	case Key:
		kv := map[string]json.RawMessage{}
		err := json.Unmarshal([]byte(split[1]), &kv)
		if err != nil {
			return fieldpath.PathElement{}, err
		}

            for (String pathElement : pathElements) {
                subPath = subPath + ":" + pathElement;
                DefaultProjectDescriptor projectDescriptor = getProjectDescriptorRegistry().getProject(subPath);
                if (projectDescriptor == null) {

func TestSetToFieldsError(t *testing.T) {
	validName := "ok"
	invalidPath := fieldpath.Path([]fieldpath.PathElement{{}, {FieldName: &validName}})

	tests := []struct {
		set       fieldpath.Set
		errString string
	}{
		{
			set:       *fieldpath.NewSet(invalidPath),
			errString: "invalid PathElement",
		},
	}

	for _, test := range tests {
		_, err := SetToFields(test.set)

		splitReplicasPath := strings.Split(strings.TrimPrefix(subresources.Scale.SpecReplicasPath, "."), ".")
		for _, element := range splitReplicasPath {
			s := element
			path = append(path, fieldpath.PathElement{FieldName: &s})
		}
		replicasPathInCustomResource[schema.GroupVersion{Group: crd.Spec.Group, Version: v.Name}.String()] = path
	}

	for _, v := range crd.Spec.Versions {