code: function V1(domain) {
    Version.prototype.constructor.call(this, domain, 'v1');
  
    // Resources
    this._messaging = undefined;
    this._phoneNumbers = undefined;
    this._voice = undefined;
  }
docs: /* jshint ignore:start 
  Initialize the V1 version of Pricing
  
  @constructor Twilio.Pricing.V1
  
  @property {Twilio.Pricing.V1.MessagingList} messaging - messaging resource
  @property {Twilio.Pricing.V1.PhoneNumberList} phoneNumbers -
  phoneNumbers resource
  @property {Twilio.Pricing.V1.VoiceList} voice - voice resource
  
  @param {Twilio.Pricing} domain - The twilio domain
   /* jshint ignore:end