whenOrNull<TResult extends Object?> method

@optionalTypeArgs TResult? whenOrNull<TResult extends Object?>(TResult? $default(String? destination, String? connectivity, XrayDuration? interval, @JsonKey.new(name: 'sampling') int? samplingCount, XrayDuration? timeout, String? httpMethod,)?)

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(
          String? destination,
          String? connectivity,
          XrayDuration? interval,
          @JsonKey(name: 'sampling') int? samplingCount,
          XrayDuration? timeout,
          String? httpMethod)?
      $default,
) {
  final _that = this;
  switch (_that) {
    case _HealthCheckSettings() when $default != null:
      return $default(_that.destination, _that.connectivity, _that.interval,
          _that.samplingCount, _that.timeout, _that.httpMethod);
    case _:
      return null;
  }
}