whenOrNull<TResult extends Object?> method

@optionalTypeArgs TResult? whenOrNull<TResult extends Object?>(TResult? $default(String $type, String uri, String title, String description, @JsonKey.new(toJson: iso8601) DateTime? createdAt, @JsonKey.new(toJson: iso8601) DateTime? updatedAt, @LabelConverter() List<Label>? labels, @RepoStrongRefConverter() List<RepoStrongRef>? associatedRefs, @ProfileViewBasicConverter() List<ProfileViewBasic>? associatedProfiles, String? logo, String? image, @EmbedExternalViewArticlePublicationThemeConverter() EmbedExternalViewArticlePublicationTheme? theme, int? subscriptionCount, @ProfileViewBasicConverter() List<ProfileViewBasic>? subscribers, 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? logo,  String? image, @EmbedExternalViewArticlePublicationThemeConverter()  EmbedExternalViewArticlePublicationTheme? theme,  int? subscriptionCount, @ProfileViewBasicConverter()  List<ProfileViewBasic>? subscribers,  Map<String, dynamic>? $unknown)?  $default,) {final _that = this;
switch (_that) {
case _EmbedExternalViewArticlePublication() when $default != null:
return $default(_that.$type,_that.uri,_that.title,_that.description,_that.createdAt,_that.updatedAt,_that.labels,_that.associatedRefs,_that.associatedProfiles,_that.logo,_that.image,_that.theme,_that.subscriptionCount,_that.subscribers,_that.$unknown);case _:
  return null;

}
}