when<TResult extends Object?> method

  1. @optionalTypeArgs
TResult when<TResult extends Object?>(
  1. TResult $default(
    1. ShippingDetailsAddress address,
    2. String? carrier,
    3. String? name,
    4. String? phone,
    5. String? trackingNumber,
    )
)

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( ShippingDetailsAddress address,  String? carrier,  String? name,  String? phone, @JsonKey(name: 'tracking_number')  String? trackingNumber)  $default,) {final _that = this;
switch (_that) {
case _PaymentElementChangeEvent():
return $default(_that.address,_that.carrier,_that.name,_that.phone,_that.trackingNumber);case _:
  throw StateError('Unexpected subclass');

}
}