code: function BillingAddress() {
      /**
       * The firstName value
       * @member
       */
      this.firstName = null;
      /**
       * The lastName value
       * @member
       */
      this.lastName = null;
      /**
       * The email value
       * @member
       */
      this.email = null;
      /**
       * The phone value
       * @member
       */
      this.phone = null;
      /**
       * The country value
       * @member
       */
      this.country = null;
      /**
       * The countryCode value
       * @member
       */
      this.countryCode = null;
      /**
       * The region value
       * @member
       */
      this.region = null;
      /**
       * The regionCode value
       * @member
       */
      this.regionCode = null;
      /**
       * The city value
       * @member
       */
      this.city = null;
      /**
       * The address1 value
       * @member
       */
      this.address1 = null;
      /**
       * The address2 value
       * @member
       */
      this.address2 = null;
      /**
       * The zip value
       * @member
       */
      this.zip = null;
      /**
       * The company value
       * @member
       */
      this.company = null;
  
  }
docs: The BillingAddress class
  @constructor
  @alias BillingAddress