whenOrNull<TResult extends Object?> method

@optionalTypeArgs TResult? whenOrNull<TResult extends Object?>(TResult? $default(@JsonKey.new(name: 'payment_method_type') String paymentMethodType, @JsonKey.new(name: 'payment_method_data') CollectBankAccountForPaymentMethodData? paymentMethodData)?)

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: 'payment_method_type')  String paymentMethodType, @JsonKey(name: 'payment_method_data')  CollectBankAccountForPaymentMethodData? paymentMethodData)?  $default,) {final _that = this;
switch (_that) {
case _CollectBankAccountForPaymentParams() when $default != null:
return $default(_that.paymentMethodType,_that.paymentMethodData);case _:
  return null;

}
}