1. DomName('Navigator.requestMediaKeySystemAccess')
  2. DocsEditable()
  3. Experimental()
Future requestMediaKeySystemAccess(String keySystem, List<Map> supportedConfigurations)

Source 

@DomName('Navigator.requestMediaKeySystemAccess')
@DocsEditable()
@Experimental() // untriaged
Future requestMediaKeySystemAccess(String keySystem, List<Map> supportedConfigurations) => convertNativePromiseToDartFuture(_blink.BlinkNavigator.instance.requestMediaKeySystemAccess_Callback_2_(this, keySystem, supportedConfigurations));