def _proxy(self):
        """
        Generate an instance context for the instance, the context is capable of
        performing various actions.  All instance actions are proxied to the context

        :returns: PublishedTrackContext for this PublishedTrackInstance
        :rtype: twilio.rest.video.v1.room.room_participant.room_participant_published_track.PublishedTrackContext
        """
        if self._context is None:
            self._context = PublishedTrackContext(
                self._version,
                room_sid=self._solution['room_sid'],
                participant_sid=self._solution['participant_sid'],
                sid=self._solution['sid'],
            )
        return self._context
Generate an instance context for the instance, the context is capable of
        performing various actions.  All instance actions are proxied to the context

        :returns: PublishedTrackContext for this PublishedTrackInstance
        :rtype: twilio.rest.video.v1.room.room_participant.room_participant_published_track.PublishedTrackContext