RTCIceCandidateInit constructor
      
      RTCIceCandidateInit({})
     
    
    
Implementation
factory RTCIceCandidateInit(
        {String? candidate,
        String? sdpMid,
        int? sdpMLineIndex,
        String? usernameFragment}) =>
    RTCIceCandidateInit._(
        candidate: candidate ?? '',
        sdpMid: sdpMid ?? undefined,
        sdpMLineIndex: sdpMLineIndex ?? undefined,
        usernameFragment: usernameFragment ?? undefined);