getAudioSources method Null safety
This command lists all available physical audio inputs of the device.
Implementation
Future<List<AudioSource>> getAudioSources() async {
loggy.debug('getAudioSources');
// Future<void> getAudioSources() async {
final envelope = await Soap.retrieveEnvelope(
uri, onvif.secureRequest(SoapRequest.audioSources()));
if (envelope.body.audioSourcesResponse == null) throw Exception();
return envelope.body.audioSourcesResponse!.audioSources;
}