EngineNotification constructor Null safety

EngineNotification(
  1. {required String type,
  2. EngineNotificationParameter? parameter,
  3. String createdUtc = '',
  4. Duration validAge = Duration.zero}
)

Notification

Implementation

EngineNotification({
  required this.type,
  this.parameter,
  this.createdUtc = '',
  this.validAge = Duration.zero,
});