@Override
    public Proxy getProxy(Request request, Task task) {
        return proxies.get(incrForLoop());
    }
A simple ProxyProvider. Provide proxy as round-robin without heartbeat and error check. It can be used when all proxies are stable.
@author code4crafter@gmail.com
        Date: 17/4/16
        Time: 10:18
@since 0.7.0
webmagic-core/src/main/java/us/codecraft/webmagic/proxy/SimpleProxyProvider.java