setEncryptionKey(publicKey) {
        if (publicKey != null && publicKey.length !== 16) {
            throw new Error(`Public key must be 16 bytes long, got ${publicKey.length} bytes instead`);
        }
        this._encryptionKey = publicKey;
    }
Set encryption key for decrypting `svc_EncryptedData` packets.
This allows decryption of messages from public matchmaking, like
chat messages and caster voice data.

The key can be extracted from `match730_*.dem.info` files with `extractPublicEncryptionKey`.

@param publicKey Public encryption key.