src/Amadeus/Client/Session/Handler/SoapHeader4.php
public function getConsumerId($generate = false)
    {
        if (is_null($this->consumerId) && $generate) {
            $this->consumerId = $this->generateGuid();
        }

        return $this->consumerId;
    }
public function getConsumerId($generate = false)
    {
        if (is_null($this->consumerId) && $generate) {
            $this->consumerId = $this->generateGuid();
        }

        return $this->consumerId;
    }
Get the TransactionFlowLink Consumer ID

@param bool $generate Whether to generate a consumer ID
@return string|null