code: function _defaultCallback(err) {
      if (err) {
          log.error(err);
          return;
      }
  
      delete arguments['0'];
      var hasArgs = false;
      for (var k in arguments) {
          console.log(arguments[k]);
          hasArgs = true;
      }
  
      if (!hasArgs) console.log('Done.');
  }
docs: Helpers