public void addEntry(SubscriberEntry entry) {
if (findByNumber(entry.getPhoneNumber()) != null) {
return;
}
Subscriber subscriber = entry.getSubscriber();
PriorityQueue<SubscriberEntry> col;
if (this.containsKey(subscriber)) {
col = this.get(subscriber);
} else {
col = new PriorityQueue<SubscriberEntry>();