whenOrNull<TResult extends Object?> method

@optionalTypeArgs TResult? whenOrNull<TResult extends Object?>(TResult? $default(List<Sub2ApiAdminApiKeyUsageTrendPoint> points, DateTime startDate, DateTime endDate, Sub2ApiAdminUsageGranularity granularity,)?)

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(
    List<Sub2ApiAdminApiKeyUsageTrendPoint> points,
    DateTime startDate,
    DateTime endDate,
    Sub2ApiAdminUsageGranularity granularity,
  )?
  $default,
) {
  final _that = this;
  switch (_that) {
    case _Sub2ApiAdminApiKeyUsageTrend() when $default != null:
      return $default(
        _that.points,
        _that.startDate,
        _that.endDate,
        _that.granularity,
      );
    case _:
      return null;
  }
}