when<TResult extends Object?>  method 
- @optionalTypeArgs
- TResult $default(- String $type,
- AtUri uri,
- String cid,
- Map<String, dynamic> record,
- ProfileViewBasic creator,
- ListViewBasic? list,
- List<ListItemView> ? listItemsSample,
- List<GeneratorView> ? feeds,
- int? joinedWeekCount,
- int? joinedAllTimeCount,
- List<Label> ? labels,
- DateTime indexedAt,
- 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,  Map<String, dynamic> record, @ProfileViewBasicConverter()  ProfileViewBasic creator, @ListViewBasicConverter()  ListViewBasic? list, @ListItemViewConverter()  List<ListItemView>? listItemsSample, @GeneratorViewConverter()  List<GeneratorView>? feeds,  int? joinedWeekCount,  int? joinedAllTimeCount, @LabelConverter()  List<Label>? labels,  DateTime indexedAt,  Map<String, dynamic>? $unknown)  $default,) {final _that = this;
switch (_that) {
case _StarterPackView():
return $default(_that.$type,_that.uri,_that.cid,_that.record,_that.creator,_that.list,_that.listItemsSample,_that.feeds,_that.joinedWeekCount,_that.joinedAllTimeCount,_that.labels,_that.indexedAt,_that.$unknown);case _:
  throw StateError('Unexpected subclass');
}
}