Enumeration en = filteredPersons.elements();
Enumeration en = unfilteredPersons.elements();
	public Person findPerson(PhoneNumber number) {		if (number == null)			return null;		Enumeration en = filteredPersons.elements();		while (en.hasMoreElements()) {			Person p = (Person) en.nextElement();			Vector numbers = p.getNumbers();			Enumeration en2 = numbers.elements();			while (en2.hasMoreElements()) {				PhoneNumber n = (PhoneNumber) en2.nextElement();				if (n.getFullNumber().equals(number.getFullNumber())) {					return p;				}			}		}		return null;	}