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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 update_http_method_params(self):
 """ Update HTTP url parameters based on msm_id and query filters if there are any. """

        url_params = {}

        if self.start:
            url_params.update(
                {"start": int(calendar.timegm(self.start.timetuple()))}
            )

        if self.stop:
            url_params.update(
                {"stop": int(calendar.timegm(self.stop.timetuple()))}
            )

        if self.probe_ids:
            url_params.update({"probe_ids": self.probe_ids})

        self.http_method_args["params"].update(url_params)