when<TResult extends Object?> method

@optionalTypeArgs TResult when<TResult extends Object?>(TResult $default(List<Sub2ApiAdminUserSpendingRankingItem> ranking, Sub2ApiDecimal totalActualCost, int totalRequests, int totalTokens, DateTime startDate, DateTime endDate,))

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(
    List<Sub2ApiAdminUserSpendingRankingItem> ranking,
    Sub2ApiDecimal totalActualCost,
    int totalRequests,
    int totalTokens,
    DateTime startDate,
    DateTime endDate,
  )
  $default,
) {
  final _that = this;
  switch (_that) {
    case _Sub2ApiAdminUserSpendingRanking():
      return $default(
        _that.ranking,
        _that.totalActualCost,
        _that.totalRequests,
        _that.totalTokens,
        _that.startDate,
        _that.endDate,
      );
    case _:
      throw StateError('Unexpected subclass');
  }
}