whenOrNull<TResult extends Object?> method

  1. @optionalTypeArgs
TResult? whenOrNull<TResult extends Object?>(
  1. TResult? $default(
    1. String? brand,
    2. String? country,
    3. int? expYear,
    4. int? expMonth,
    5. String? funding,
    6. String? last4,
    7. String? preferredNetwork,
    8. List<String>? availableNetworks,
    )?
)

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? brand,  String? country,  int? expYear,  int? expMonth,  String? funding,  String? last4,  String? preferredNetwork,  List<String>? availableNetworks)?  $default,) {final _that = this;
switch (_that) {
case _CardPaymentMethod() when $default != null:
return $default(_that.brand,_that.country,_that.expYear,_that.expMonth,_that.funding,_that.last4,_that.preferredNetwork,_that.availableNetworks);case _:
  return null;

}
}