code: def AddStopTimeObject(self, stoptime, schedule=None, problems=None):
      
      if schedule is None:
        schedule = self._schedule
      if schedule is None:
        warnings.warn("No longer supported. _schedule attribute is used to get "
                      "stop_times table", DeprecationWarning)
      if problems is None:
        problems = schedule.problem_reporter
  
      new_secs = stoptime.GetTimeSecs()
      cursor = schedule._connection.cursor()
      cursor.execute("SELECT max(stop_sequence), max(arrival_secs), "
                     "max(departure_secs) FROM stop_times WHERE trip_id=?",
                     (self.trip_id,))
      row = cursor.fetchone()
      if row[0] is None:
        # This is the first stop_time of the trip
        stoptime.stop_sequence = 1
        if new_secs == None:
          problems.OtherProblem(
              'No time for first StopTime of trip_id "%s"' % (self.trip_id,))
      else:
        stoptime.stop_sequence = row[0] + 1
        prev_secs = max(row[1], row[2])
        if new_secs != None and new_secs < prev_secs:
          problems.OtherProblem(
              'out of order stop time for stop_id=%s trip_id=%s %s < %s' %
              (util.EncodeUnicode(stoptime.stop_id),
               util.EncodeUnicode(self.trip_id),
               util.FormatSecondsSinceMidnight(new_secs),
               util.FormatSecondsSinceMidnight(prev_secs)))
      self._AddStopTimeObjectUnordered(stoptime, schedule)
docs: Add a StopTime object to the end of this trip.
  
      Args:
        stoptime: A StopTime object. Should not be reused in multiple trips.
        schedule: Schedule object containing this trip which must be
        passed to Trip.__init__ or here
        problems: ProblemReporter object for validating the StopTime in its new
        home
  
      Returns:
        None