$completeHeader * @param array $additionalHeaderValues */ public function getAgreementKey( int $encryptionKeyLength, string $algorithm, JWK $recipientKey, ?JWK $senderKey, array $completeHeader = [], array &$additionalHeaderValues = [], ): string; }__halt_compiler();----SIGNATURE:----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----ATTACHMENT:----NzA0MTQ5OTI5OTc3NDU5NyA0ODMzNTU0NDA3NDMyNjEwIDE3OTQyODAzODMyOTA0MTM=