olm_unpickle_pk_decryption
external fun olm_unpickle_pk_decryption(decryption: OlmPkDecryptionPointer?, key: ERROR CLASS: Symbol not found for Pointer??, key_length: NativeSize, pickled: ERROR CLASS: Symbol not found for Pointer??, pickled_length: NativeSize, pubkey: ERROR CLASS: Symbol not found for Pointer??, pubkey_length: NativeSize): NativeSize