docs: public ThumbnailDownload getThumbnail(String path, ThumbnailSize size, ThumbnailFormat format) {
          OAuthRequest request = new OAuthRequest(Verb.GET, THUMBNAILS_URL + encode(path));
  
          if (size != THUMBNAIL_SIZE) {
              request.addQuerystringParameter("size", size.toString());
          }
  
          if (format != THUMBNAIL_FORMAT) {
              request.addQuerystringParameter("format", format.toString());
          }
  
          service.signRequest(accessToken, request);
          Response response = checkThumbnails(request.send());
  
          return new ThumbnailDownload(response, path, size, format);
      }