+ self._phoneNumber = phoneNumber
+
+ @staticmethod
+ def from_handle_name(handleName):
+ parts = handleName.split("#")
+ assert len(parts) == 2
+ contactId, contactNumber = parts[0:2]
+ return contactId, contactNumber
+
+ @staticmethod
+ def to_handle_name(contactId, contactNumber):
+ handleName = "#".join((contactId, strip_number(contactNumber)))
+ return handleName