docs: function (params, callback) {
          /**
           * Callback for QB.content.markUploaded(params, callback)
           * @callback markUploadedFileCallback
           * @param {object} error - The error object
           * @param {object} response - The empty body
           */
          this.service.ajax({
              url: Utils.getUrl(config.urls.blobs, params.id + '/complete'),
              type: 'PUT',
              data: {
                  size: params.size
              },
              dataType: 'text'
          }, function(err, res){
              if (err) {
                  callback (err, null);
              } else {
                  callback (null, res);
              }
          });
      }