+ /**
+ * Requests Pinging of domains.
+ *
+ * @param toReping
+ * if not null, the {@link DomainPingConfiguration} to test, if
+ * null, just re-check if there is something to do.
+ */
+ public static void notifyPinger(DomainPingConfiguration toReping) {
+ if (toReping != null) {
+ instance.pinger.queue(toReping);
+ }