whenOrNull<TResult extends Object?> method

  1. @optionalTypeArgs
TResult? whenOrNull<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. String? image,
    11. @EmbedExternalViewArticlePublicationConverter() EmbedExternalViewArticlePublication? publisher,
    12. int? readingTime,
    13. int? likeCount,
    14. @ProfileViewBasicConverter() List<ProfileViewBasic>? likers,
    15. Map<String, dynamic>? $unknown,
    )?
)

A variant of when that fallback to returning null

It is equivalent to doing:

switch (sealedClass) {
  case Subclass(:final field):
    return ...;
  case _:
    return null;
}

Implementation

@optionalTypeArgs TResult? whenOrNull<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,  String? image, @EmbedExternalViewArticlePublicationConverter()  EmbedExternalViewArticlePublication? publisher,  int? readingTime,  int? likeCount, @ProfileViewBasicConverter()  List<ProfileViewBasic>? likers,  Map<String, dynamic>? $unknown)?  $default,) {final _that = this;
switch (_that) {
case _EmbedExternalViewArticle() when $default != null:
return $default(_that.$type,_that.uri,_that.title,_that.description,_that.createdAt,_that.updatedAt,_that.labels,_that.associatedRefs,_that.associatedProfiles,_that.image,_that.publisher,_that.readingTime,_that.likeCount,_that.likers,_that.$unknown);case _:
  return null;

}
}