code: function NexmoSuccessStatus(response) {
    MessagingServiceStatus.call(this, 'nexmo');
  
    // Create message string
    var parts = parseInt(response['message-count']);
    this.state.message = 'Sent to ' + response.messages[0].to + ' in ' + parts.toString() + ' parts: ';
  
    for (var i = 0; i < parts; i++) {
      this.state.message += response.messages[i]['message-id'];
  
      if (i != parts - 1) {
        this.state.message += ', ';
      }
    }
  
    // Message sent successfully
    this.state.code = this.StatusCodes.SUCCESS;
  }
docs: /*=============================================================================
  
  Define Nexmo Service Status Handlers
  
  ============================================================================= /*
  Success Status
  
  @param response     JSON response object from Nexmo service