public ApnsServiceBuilder withSocksProxy(String host, int port) {
        Proxy proxy = new Proxy(Proxy.Type.SOCKS,
                new InetSocketAddress(host, port));
        return withProxy(proxy);
    }
Specify the address of the SOCKS proxy the connection should
use.

<p>Read the <a href="http://java.sun.com/javase/6/docs/technotes/guides/net/proxies.html">
Java Networking and Proxies</a> guide to understand the
proxies complexity.

<p>Be aware that this method only handles SOCKS proxies, not
HTTPS proxies.  Use {@link #withProxy(Proxy)} instead.

@param host  the hostname of the SOCKS proxy
@param port  the port of the SOCKS proxy server
@return  this
src/main/java/com/notnoop/apns/ApnsServiceBuilder.java