whenOrNull<TResult extends Object?> method

  1. @optionalTypeArgs
TResult? whenOrNull<TResult extends Object?>(
  1. TResult? $default(
    1. String paymentId,
    2. String optionId,
    3. List<String> signatures,
    4. List<CollectDataFieldResult>? collectedData,
    5. int? maxPollMs,
    )?
)

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 paymentId,  String optionId,  List<String> signatures,  List<CollectDataFieldResult>? collectedData,  int? maxPollMs)?  $default,) {final _that = this;
switch (_that) {
case _ConfirmPaymentRequest() when $default != null:
return $default(_that.paymentId,_that.optionId,_that.signatures,_that.collectedData,_that.maxPollMs);case _:
  return null;

}
}