onContextWillBeDestroyed property
      
      Stream<GraphObjectId> 
      get
      onContextWillBeDestroyed
      
    
    
Notifies that an existing BaseAudioContext will be destroyed.
Implementation
Stream<GraphObjectId> get onContextWillBeDestroyed => _client.onEvent
    .where((event) => event.name == 'WebAudio.contextWillBeDestroyed')
    .map(
      (event) =>
          GraphObjectId.fromJson(event.parameters['contextId'] as String),
    );