code: function(params, callback) {
          /**
           * Callback for QB.content.list(params, callback)
           * @callback listOfFilesCallback
           * @param {object} error - The error object
           * @param {object} response - Object with Array of files
           */
          if (typeof params === 'function' && typeof callback === 'undefined') {
              callback = params;
              params = null;
          }
  
          this.service.ajax({url: Utils.getUrl(config.urls.blobs), data: params, type: 'GET'}, function(err,result){
              if (err) {
                  callback(err, null);
              } else {
                  callback (err, result);
              }
          });
      }
docs: Get a list of files for current user ({@link https://docsdev.quickblox.com/rest_api/Content_API.html#Retrieve_files read more})
  @memberof QB.content
  @param {object} params - Object of parameters
  @param {number} [params.page=1] - Used to paginate the results when more than one page of files retrieved
  @param {number} [params.per_page=10] - The maximum number of files to return per page, if not specified then the default is 10
  @param {listOfFilesCallback} callback - The listOfFilesCallback function