getVideoSources method Null safety

Future<List<VideoSource>> getVideoSources()

This command lists all available physical video inputs of the device.

Implementation

Future<List<VideoSource>> getVideoSources() async {
  final envelope = await Soap.retrieveEnvlope(
      uri, onvif.secureRequest(SoapRequest.videoSources()));

  if (envelope.body.videoSourcesResponse == null) throw Exception();

  return envelope.body.videoSourcesResponse!.videoSources;
}