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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def load_earlier_messages_till(self, last):
 """ Triggers loading of messages till a specific point in time :param last: Datetime object for the last message to be loaded :type last: datetime :return: Nothing :rtype: None """

        timestamp = time.mktime(last.timetuple())
        self.driver.wapi_functions.loadEarlierMessagesTillDate(self.id, timestamp)