Merge "Document a section of code"

            }

            final Network network = connectivityManager.getActiveNetwork();

            final NetworkInfo ni = connectivityManager.getNetworkInfo(network);

            // This connectivity check is to avoid performing a DNS lookup for the time server on a

            // unconnected network. There are races to obtain time in Android when connectivity

            // changes, which means that forceRefresh() can be called by various components before

            // the network is actually available. This led in the past to DNS lookup failures being

            // cached (~2 seconds) thereby preventing the device successfully making an NTP request

            // when connectivity had actually been established.

            // A side effect of check is that tests that run a fake NTP server on the device itself

            // will only be able to use it if the active network is connected, even though loopback

            // addresses are actually reachable.

            if (ni == null || !ni.isConnected()) {

                if (LOGD) Log.d(TAG, "forceRefresh: no connectivity");

                return false;