docs: function(id, callback) {
          /**
           * Callback for QB.content.delete(id, callback)
           * @callback deleteFileCallback
           * @param {object} error - The error object
           * @param {object} response - Boolean
           */
          this.service.ajax({url: Utils.getUrl(config.urls.blobs, id), type: 'DELETE', dataType: 'text'}, function(err, result) {
              if (err) {
                  callback(err, null);
              } else {
                  callback(null, true);
              }
          });
      }