code: function Marketplace(domain) {
    Version.prototype.constructor.call(this, domain, 'marketplace');
  
    // Resources
    this._installedAddOns = undefined;
    this._availableAddOns = undefined;
  }
docs: /* jshint ignore:start 
  Initialize the Marketplace version of Preview
  
  @constructor Twilio.Preview.Marketplace
  
  @property {Twilio.Preview.Marketplace.InstalledAddOnList} installedAddOns -
  installedAddOns resource
  @property {Twilio.Preview.Marketplace.AvailableAddOnList} availableAddOns -
  availableAddOns resource
  
  @param {Twilio.Preview} domain - The twilio domain
   /* jshint ignore:end