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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 get(self, sid):
 """ Constructs a PublishedTrackContext :param sid: A 34 character string that uniquely identifies this resource. :returns: twilio.rest.video.v1.room.room_participant.room_participant_published_track.PublishedTrackContext :rtype: twilio.rest.video.v1.room.room_participant.room_participant_published_track.PublishedTrackContext """

        return PublishedTrackContext(
            self._version,
            room_sid=self._solution['room_sid'],
            participant_sid=self._solution['participant_sid'],
            sid=sid,
        )