contactNumbers = list(self._to_contact_numbers(contactDetails))
assert contactNumbers
contactIndex = defaultIndex if defaultIndex != -1 else 0
contact = contactNumbers, contactIndex, messages
self._contacts.append(contact)
contactNumbers = list(self._to_contact_numbers(contactDetails))
assert contactNumbers
contactIndex = defaultIndex if defaultIndex != -1 else 0
contact = contactNumbers, contactIndex, messages
self._contacts.append(contact)