public void removePhoneNumber(TelephoneNumber telephoneNumber) {
Enumeration keys = ((Hashtable) telephoneNumbers).keys();
while (keys.hasMoreElements()) {
Object key = keys.nextElement();
TelephoneNumber potentialTelephoneNumber = (TelephoneNumber) telephoneNumbers.get(key);
if (potentialTelephoneNumber.equals(telephoneNumber)) {
telephoneNumbers.remove(key);
potentialTelephoneNumber.setBeerConsumer(null);
return;
}
}
}
