code: public function airMultiAvailability(
          RequestOptions\AirMultiAvailabilityOptions $options,
          $messageOptions = []
      ) {
          $msgName = 'Air_MultiAvailability';
  
          return $this->callMessage($msgName, $options, $messageOptions);
      }
docs: Air_MultiAvailability
  
  @param RequestOptions\AirMultiAvailabilityOptions $options
  @param array $messageOptions (OPTIONAL)
  @return Result
  @throws Client\InvalidMessageException
  @throws Client\RequestCreator\MessageVersionUnsupportedException
  @throws Exception