How to add multiple images/files on a same parameter along with other textual data using retrofit?

```
Single image is uploading perfectly using following interface
    @Multipart
    @POST("/users/updateProfile/")
    public void updateProfileWithImage(
                    @Part("user_id") TypedString first_name,
                    @Part ("image") TypedFile image, 
                    Callback<WebResponse> callback);

```