when<TResult extends Object?> method

  1. @optionalTypeArgs
TResult when<TResult extends Object?>(
  1. TResult $default(
    1. String $type,
    2. String uri,
    3. String title,
    4. String description,
    5. @JsonKey.new(toJson: iso8601) DateTime? createdAt,
    6. @JsonKey.new(toJson: iso8601) DateTime? updatedAt,
    7. @LabelConverter() List<Label>? labels,
    8. @RepoStrongRefConverter() List<RepoStrongRef>? associatedRefs,
    9. @ProfileViewBasicConverter() List<ProfileViewBasic>? associatedProfiles,
    10. @UEmbedExternalViewGalleryItemsConverter() List<UEmbedExternalViewGalleryItems> items,
    11. int? likeCount,
    12. @ProfileViewBasicConverter() List<ProfileViewBasic>? likers,
    13. 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,  String uri,  String title,  String description, @JsonKey(toJson: iso8601)  DateTime? createdAt, @JsonKey(toJson: iso8601)  DateTime? updatedAt, @LabelConverter()  List<Label>? labels, @RepoStrongRefConverter()  List<RepoStrongRef>? associatedRefs, @ProfileViewBasicConverter()  List<ProfileViewBasic>? associatedProfiles, @UEmbedExternalViewGalleryItemsConverter()  List<UEmbedExternalViewGalleryItems> items,  int? likeCount, @ProfileViewBasicConverter()  List<ProfileViewBasic>? likers,  Map<String, dynamic>? $unknown)  $default,) {final _that = this;
switch (_that) {
case _EmbedExternalViewGallery():
return $default(_that.$type,_that.uri,_that.title,_that.description,_that.createdAt,_that.updatedAt,_that.labels,_that.associatedRefs,_that.associatedProfiles,_that.items,_that.likeCount,_that.likers,_that.$unknown);case _:
  throw StateError('Unexpected subclass');

}
}