getAvailability method Null safety
Implementation
Future<PresentationAvailability> getAvailability() =>
promiseToFuture<PresentationAvailability>(
JS("", "#.getAvailability()", this));
Future<PresentationAvailability> getAvailability() =>
promiseToFuture<PresentationAvailability>(
JS("", "#.getAvailability()", this));