participant method
Implementation
Participant participant(Map participantDict) {
MediaState mediaState = MediaState(participantDict[_kVideoEnabled], participantDict[_kAudioEnabled], participantDict[_kScreenEnabled]);
Participant participant = Participant(participantDict[_kParticipantId], participantDict[_kParticipantName], participantDict[_kTextureId], mediaState);
return participant;
}