whenOrNull<TResult extends Object?> method

  1. @optionalTypeArgs
TResult? whenOrNull<TResult extends Object?>(
  1. TResult? $default(
    1. String? key,
    2. String? name,
    3. String? spdxId,
    4. ModelUri? url,
    5. String? nodeId,
    )?
)

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? key, String? name, String? spdxId, ModelUri? url,
          String? nodeId)?
      $default,
) {
  final _that = this;
  switch (_that) {
    case _GithubLicenseValue() when $default != null:
      return $default(
          _that.key, _that.name, _that.spdxId, _that.url, _that.nodeId);
    case _:
      return null;
  }
}