Jose\Object\JWS::checkPayloadEncoding PHP Метод

    private function checkPayloadEncoding()
    {
        $is_encoded = null;
        foreach ($this->getSignatures() as $signature) {
            if (null === $is_encoded) {
                $is_encoded = $this->isPayloadEncoded($signature);
            }
            if (false === $this->isPayloadDetached()) {
                Assertion::eq($is_encoded, $this->isPayloadEncoded($signature), 'Foreign payload encoding detected. The JWS cannot be converted.');
            }
        }
    }