Subscription constructor Null safety

Subscription(
  1. {SubscriptionId? id,
  2. Topic? topic}
)

Implementation

factory Subscription({
  SubscriptionId? id,
  Topic? topic,
}) {
  final _result = create();
  if (id != null) {
    _result.id = id;
  }
  if (topic != null) {
    _result.topic = topic;
  }
  return _result;
}