olm_pk_decrypt
external fun olm_pk_decrypt(decryption: OlmPkDecryptionPointer?, ephemeral_key: ERROR CLASS: Symbol not found for Pointer??, ephemeral_key_length: NativeSize, mac: ERROR CLASS: Symbol not found for Pointer??, mac_length: NativeSize, cipherText: ERROR CLASS: Symbol not found for Pointer??, cipherText_length: NativeSize, plaintext: ERROR CLASS: Symbol not found for Pointer??, max_plaintext_length: NativeSize): NativeSize