whenOrNull<TResult extends Object?> method

  1. @optionalTypeArgs
TResult? whenOrNull<TResult extends Object?>(
  1. TResult? $default(
    1. String? profileID,
    2. bool? allowWhatsApp,
    3. bool? allowText,
    4. bool? allowPush,
    5. bool? allowEmail,
    )?
)

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(
          @JsonKey(name: 'profileID') String? profileID,
          @JsonKey(name: 'allowWhatsApp') bool? allowWhatsApp,
          @JsonKey(name: 'allowTextSMS') bool? allowText,
          @JsonKey(name: 'allowPush') bool? allowPush,
          @JsonKey(name: 'allowEmail') bool? allowEmail)?
      $default,
) {
  final _that = this;
  switch (_that) {
    case _CommunicationSettings() when $default != null:
      return $default(_that.profileID, _that.allowWhatsApp, _that.allowText,
          _that.allowPush, _that.allowEmail);
    case _:
      return null;
  }
}