AcmePhp\Ssl\Certificate::__construct PHP Method

    public function __construct($certificatePEM, Certificate $issuerCertificate = null)
    {
        Assert::stringNotEmpty($certificatePEM, __CLASS__ . '::$certificatePEM should not be an empty string. Got %s');
        $this->certificatePEM = $certificatePEM;
        $this->issuerCertificate = $issuerCertificate;
    }