def __call__(self, sid):
return ParticipantContext(<EOL>self._version,<EOL>service_sid=self._solution['<STR_LIT>'],<EOL>session_sid=self._solution['<STR_LIT>'],<EOL>sid=sid,<EOL>)<EOL>
Constructs a ParticipantContext

:param sid: The unique string that identifies the resource

:returns: twilio.rest.proxy.v1.service.session.participant.ParticipantContext
:rtype: twilio.rest.proxy.v1.service.session.participant.ParticipantContext