whenOrNull<TResult extends Object?> method

  1. @optionalTypeArgs
TResult? whenOrNull<TResult extends Object?>(
  1. TResult? $default(
    1. String paymentId,
    2. PaymentInfo? info,
    3. List<PaymentOption> options,
    4. CollectDataAction? collectData,
    )?
)

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,  PaymentInfo? info,  List<PaymentOption> options,  CollectDataAction? collectData)?  $default,) {final _that = this;
switch (_that) {
case _PaymentOptionsResponse() when $default != null:
return $default(_that.paymentId,_that.info,_that.options,_that.collectData);case _:
  return null;

}
}