@Deprecated
    @Override
    public ClientFactoryBuilder tls(PrivateKey key, @Nullable String keyPassword,
                                    X509Certificate... keyCertChain) {
        return (ClientFactoryBuilder) TlsSetters.super.tls(key, keyPassword, keyCertChain);
    }
Configures SSL or TLS for client certificate authentication with the specified {@link PrivateKey},
{@code keyPassword} and {@link X509Certificate} chain.

@deprecated Use {@link #tls(TlsKeyPair)} with {@link TlsKeyPair#of(PrivateKey, X509Certificate...)}
            instead.
core/src/main/java/com/linecorp/armeria/client/ClientFactoryBuilder.java