public static Socks4ProxyConfig socks4(InetSocketAddress proxyAddress) {
        requireNonNull(proxyAddress, "proxyAddress");
        return new Socks4ProxyConfig(proxyAddress, null);
    }
Creates a {@code ProxyConfig} configuration for SOCKS4 protocol.

@param proxyAddress the proxy address
core/src/main/java/com/linecorp/armeria/client/proxy/ProxyConfig.java