when<TResult extends Object?> method

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

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? key, String? name, String? spdxId, ModelUri? url,
          String? nodeId)
      $default,
) {
  final _that = this;
  switch (_that) {
    case _GithubLicenseValue():
      return $default(
          _that.key, _that.name, _that.spdxId, _that.url, _that.nodeId);
    case _:
      throw StateError('Unexpected subclass');
  }
}