code: function (options, callback) {
          if (_.isFunction(options) && !callback) {
              callback = options;
              options = {};
          }
  
          options = _.clone(options);
          bootcode(function (err, code) {
              if (err) { return callback(err); }
              if (!code) { return callback(new Error('sandbox: bootcode missing!')); }
  
              options.bootCode = code; // assign the code in options
              PostmanSandbox.create(options, callback);
          });
      }
docs: Creates a new instance of sandbox from the options that have been provided
  @param {Object=} [options]
  @param {Function} callback