when<TResult extends Object?> method

@optionalTypeArgs TResult when<TResult extends Object?>(TResult $default(List<Sub2ApiAdminUserUsageTrendPoint> points, DateTime startDate, DateTime endDate, Sub2ApiAdminUsageGranularity granularity,))

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<Sub2ApiAdminUserUsageTrendPoint> points,
    DateTime startDate,
    DateTime endDate,
    Sub2ApiAdminUsageGranularity granularity,
  )
  $default,
) {
  final _that = this;
  switch (_that) {
    case _Sub2ApiAdminUserUsageTrend():
      return $default(
        _that.points,
        _that.startDate,
        _that.endDate,
        _that.granularity,
      );
    case _:
      throw StateError('Unexpected subclass');
  }
}