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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 stream(self, muted=values.unset, hold=values.unset, coaching=values.unset, limit=None, page_size=None):
 """ Streams ParticipantInstance records from the API as a generator stream. This operation lazily loads records as efficiently as possible until the limit is reached. The results are returned as a generator, so this operation is memory efficient. :param bool muted: Whether to return only participants that are muted :param bool hold: Whether to return only participants that are on hold :param bool coaching: Whether to return only participants who are coaching another call :param int limit: Upper limit for the number of records to return. stream() guarantees to never return more than limit. Default is no limit :param int page_size: Number of records to fetch per request, when not set will use the default value of 50 records. If no page_size is defined but a limit is defined, stream() will attempt to read the limit with the most efficient page size, i.e. min(limit, 1000) :returns: Generator that will yield up to limit results :rtype: list[twilio.rest.api.v2010.account.conference.participant.ParticipantInstance] """

        limits = self._version.read_limits(limit, page_size)

        page = self.page(muted=muted, hold=hold, coaching=coaching, page_size=limits['page_size'], )

        return self._version.stream(page, limits['limit'], limits['page_limit'])