widget.participant.addListener(_onParticipantChanged);

@override
  Widget build(BuildContext context) => !_rendererReady
      ? Container()
      : Builder(
          key: _internalKey,
          builder: (ctx) {
            // let it render before notifying build
            WidgetsBindingCompatible.instance
                ?.addPostFrameCallback((timeStamp) {
              widget.track.onVideoViewBuild?.call(_internalKey);
            });
            return rtc.RTCVideoView(
              _renderer,
              mirror: _shouldMirror(),
              filterQuality: FilterQuality.medium,
              objectFit: widget.fit,
            );
          },
        );