when<TResult extends Object?> method

  1. @optionalTypeArgs
TResult when<TResult extends Object?>(
  1. TResult $default(
    1. String accountNumber,
    2. String routingNumber,
    3. BankAccountHolderType? accountHolderType,
    4. UsBankAccountType? accountType,
    5. BillingDetails? billingDetails,
    6. ShippingDetails? shippingDetails,
    7. MandateData? mandateData,
    8. Map<String, String>? metadata,
    )
)

A switch-like method, using callbacks.

As opposed to map, this offers destructuring. It is equivalent to doing:

switch (sealedClass) {
  case Subclass(:final field):
    return ...;
  case Subclass2(:final field2):
    return ...;
}

Implementation

@optionalTypeArgs TResult when<TResult extends Object?>(TResult Function( String accountNumber,  String routingNumber,  BankAccountHolderType? accountHolderType,  UsBankAccountType? accountType,  BillingDetails? billingDetails,  ShippingDetails? shippingDetails,  MandateData? mandateData,  Map<String, String>? metadata)  $default,) {final _that = this;
switch (_that) {
case _PaymentMethodDataUsBank():
return $default(_that.accountNumber,_that.routingNumber,_that.accountHolderType,_that.accountType,_that.billingDetails,_that.shippingDetails,_that.mandateData,_that.metadata);case _:
  throw StateError('Unexpected subclass');

}
}