when<TResult extends Object?> method

  1. @optionalTypeArgs
TResult when<TResult extends Object?>(
  1. TResult $default(
    1. String? line1,
    2. String? line2,
    3. String? city,
    4. String? state,
    5. String? country,
    6. String? postalCode,
    )
)

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? line1,  String? line2,  String? city,  String? state,  String? country, @JsonKey(name: 'postal_code')  String? postalCode)  $default,) {final _that = this;
switch (_that) {
case _PaymentElementBillingDetailsAddress():
return $default(_that.line1,_that.line2,_that.city,_that.state,_that.country,_that.postalCode);case _:
  throw StateError('Unexpected subclass');

}
}