presto-main/src/main/java/io/prestosql/eventlistener/EventListenerManager.java/EventListenerManager/queryCompleted
class EventListenerManager:    public void queryCompleted(QueryCompletedEvent queryCompletedEvent)
    {
        if (configuredEventListener.get().isPresent()) {
            configuredEventListener.get().get().queryCompleted(queryCompletedEvent);
        }
    }