src/Amadeus/Client/RequestCreator/Base.php
protected function getActiveVersionFor($messageName)
    {
        $found = null;

        if (isset($this->messagesAndVersions[$messageName]) &&
            isset($this->messagesAndVersions[$messageName]['version'])
        ) {
            $found = $this->messagesAndVersions[$messageName]['version'];
        }

        return $found;
    }
protected function getActiveVersionFor($messageName)
    {
        $found = null;

        if (isset($this->messagesAndVersions[$messageName]) &&
            isset($this->messagesAndVersions[$messageName]['version'])
        ) {
            $found = $this->messagesAndVersions[$messageName]['version'];
        }

        return $found;
    }
Get the version number active in the WSDL for the given message

@param string $messageName
@return float|string|null