switch (form.crudMode) {
        case CrudMode.CREATE:
            return OptionalEntity.of(new Group()).map(entity -> {
                entity.setId(Base64.getUrlEncoder().encodeToString(form.name.getBytes(Constants.CHARSET_UTF_8)));
                return entity;
            });
        case CrudMode.EDIT:
            if (form instanceof EditForm) {

	if err != nil {
		t.Fatalf("NewEndpoint failed %v", endpoint)
	}

	if err = endpoint.UpdateIsLocal(); err != nil {
		t.Fatalf("UpdateIsLocal failed %v", err)
	}

	endpoint.PoolIdx = 0
	endpoint.SetIdx = 0
	endpoint.DiskIdx = 0

	poolEps := []PoolEndpoints{{
		Endpoints: Endpoints{endpoint},
	}}
	poolEps[0].SetCount = 1
	poolEps[0].DrivesPerSet = 1

	// Register handlers on newly created servers

                                    final IndexRequestBuilder requestBuilder = client.prepareIndex()
                                            .setIndex(configIndex)
                                            .setId(result.get("index").get("_id"))
                                            .setSource(source, XContentType.JSON);
                                    builder.add(requestBuilder);
                                }

        return new UrlQueue<Object>() {
            @Override
            public Object getId() {
                return null;
            }

            @Override
            public void setId(Object id) {
            }

            @Override
            public String getSessionId() {
                return sessionId;
            }

            @Override

    public Path getBasedirPath() {
        return basedirPath;
    }

    @Override
    public String getProtocol() {
        return protocol;
    }

    @Override
    public void setId(String id) {
        this.id = id;
    }

    @Override
    public void setUrl(String url) {
        this.url = url;

        this.protocol = protocol(url);
        this.basedir = basedir(url);

        String src = source.getId();
        if (src != null) {
            if (sourceDominant || target.getId() == null) {
                target.setId(src);
                target.setLocation("id", source.getLocation("id"));
            }
        }
    }

	CompleteMultipartUpload(ctx context.Context, bucket, object, uploadID string, uploadedParts []CompletePart, opts ObjectOptions) (objInfo ObjectInfo, err error)

	GetDisks(poolIdx, setIdx int) ([]StorageAPI, error) // return the disks belonging to pool and set.
	SetDriveCounts() []int                              // list of erasure stripe size for each pool in order.

	// Healing operations.

        when(mockClient.prepareDelete()).thenReturn(mockDeleteBuilder);
        when(mockDeleteBuilder.setIndex("test-index")).thenReturn(mockDeleteBuilder);
        when(mockDeleteBuilder.setId("doc1")).thenReturn(mockDeleteBuilder);
        when(mockBulkBuilder.add(any(DeleteRequestBuilder.class))).thenReturn(mockBulkBuilder);
        when(mockBulkBuilder.execute()).thenReturn(mockBulkFuture);

    private static OptionalEntity<User> getEntity(final CreateForm form) {
        switch (form.crudMode) {
        case CrudMode.CREATE:
            return OptionalEntity.of(new User()).map(entity -> {
                entity.setId(Base64.getUrlEncoder().encodeToString(form.name.getBytes(Constants.CHARSET_UTF_8)));
                return entity;
            });
        case CrudMode.EDIT:
            if (form instanceof EditForm) {

            private String id;

            @Override
            public String getId() {
                return id;
            }

            @Override
            public void setId(String id) {
                this.id = id;
            }

            @Override
            public String getTransformerName() {
                return transformerName;
            }