whenOrNull<TResult extends Object?> method

@optionalTypeArgs TResult? whenOrNull<TResult extends Object?>(TResult? $default(int activeRequests, int requestsPerMinute, Sub2ApiDecimal averageResponseTime, Sub2ApiDecimal errorRate,)?)

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(
    int activeRequests,
    int requestsPerMinute,
    Sub2ApiDecimal averageResponseTime,
    Sub2ApiDecimal errorRate,
  )?
  $default,
) {
  final _that = this;
  switch (_that) {
    case _Sub2ApiAdminDashboardRealtimeMetrics() when $default != null:
      return $default(
        _that.activeRequests,
        _that.requestsPerMinute,
        _that.averageResponseTime,
        _that.errorRate,
      );
    case _:
      return null;
  }
}