def addMessage(self, message, other_end, sender):
message_pointer = MessagePointer(parent=MessagePointer.messagePointerKey(self,
other_end))
message_pointer.message_id = message.key.id()
message_pointer.sender = sender.getId()
epoch = datetime.datetime(1970, 1, 1, 0, 0, 0)
message_pointer.put()
