whenOrNull<TResult extends Object?> method

@optionalTypeArgs TResult? whenOrNull<TResult extends Object?>(TResult? $default(String? name, String? path, String? content, String? sha, String? type, String? encoding, String? patch, String? status, @refParam GithubUserModelRef? committer, int size, int additionsCount, int deletionsCount, int changesCount, ModelUri? rawUrl, ModelUri? blobUrl, ModelUri? htmlUrl, ModelUri? gitUrl, ModelUri? downloadUrl, @jsonParam List<GithubContentModel>? children, bool fromServer,)?)

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? name,
          String? path,
          String? content,
          String? sha,
          String? type,
          String? encoding,
          String? patch,
          String? status,
          @refParam GithubUserModelRef committer,
          int size,
          int additionsCount,
          int deletionsCount,
          int changesCount,
          ModelUri? rawUrl,
          ModelUri? blobUrl,
          ModelUri? htmlUrl,
          ModelUri? gitUrl,
          ModelUri? downloadUrl,
          @jsonParam List<GithubContentModel>? children,
          bool fromServer)?
      $default,
) {
  final _that = this;
  switch (_that) {
    case _GithubContentModel() when $default != null:
      return $default(
          _that.name,
          _that.path,
          _that.content,
          _that.sha,
          _that.type,
          _that.encoding,
          _that.patch,
          _that.status,
          _that.committer,
          _that.size,
          _that.additionsCount,
          _that.deletionsCount,
          _that.changesCount,
          _that.rawUrl,
          _that.blobUrl,
          _that.htmlUrl,
          _that.gitUrl,
          _that.downloadUrl,
          _that.children,
          _that.fromServer);
    case _:
      return null;
  }
}