LaravelFCM\Response\GroupResponse::parseFailed PHP Method

    private function parseFailed($responseInJson)
    {
        if (array_key_exists(self::FAILED_REGISTRATION_IDS, $responseInJson)) {
            foreach ($responseInJson[self::FAILED_REGISTRATION_IDS] as $registrationId) {
                $this->tokensFailed[] = $registrationId;
            }
        }
    }