getReceivers method
Implementation
@override
Future<List<RTCRtpReceiver>> getReceivers() async {
var receivers = jsutil.callMethod(_jsPc, 'getReceivers', []);
var list = <RTCRtpReceiver>[];
receivers.forEach((e) {
list.add(RTCRtpReceiverWeb(e));
});
return list;
}