when<TResult extends Object?> method

  1. @optionalTypeArgs
TResult when<TResult extends Object?>(
  1. TResult $default(
    1. String $type,
    2. @AtUriConverter.new() AtUri uri,
    3. String cid,
    4. @ProfileViewConverter() ProfileView author,
    5. @NotificationReasonConverter() NotificationReason reason,
    6. @AtUriConverter.new() AtUri? reasonSubject,
    7. Map<String, dynamic> record,
    8. bool isRead,
    9. DateTime indexedAt,
    10. @LabelConverter() List<Label>? labels,
    11. Map<String, dynamic>? $unknown,
    )
)

A switch-like method, using callbacks.

As opposed to map, this offers destructuring. It is equivalent to doing:

switch (sealedClass) {
  case Subclass(:final field):
    return ...;
  case Subclass2(:final field2):
    return ...;
}

Implementation

@optionalTypeArgs TResult when<TResult extends Object?>(TResult Function( String $type, @AtUriConverter()  AtUri uri,  String cid, @ProfileViewConverter()  ProfileView author, @NotificationReasonConverter()  NotificationReason reason, @AtUriConverter()  AtUri? reasonSubject,  Map<String, dynamic> record,  bool isRead,  DateTime indexedAt, @LabelConverter()  List<Label>? labels,  Map<String, dynamic>? $unknown)  $default,) {final _that = this;
switch (_that) {
case _Notification():
return $default(_that.$type,_that.uri,_that.cid,_that.author,_that.reason,_that.reasonSubject,_that.record,_that.isRead,_that.indexedAt,_that.labels,_that.$unknown);case _:
  throw StateError('Unexpected subclass');

}
}