when<TResult extends Object?> method

  1. @optionalTypeArgs
TResult when<TResult extends Object?>(
  1. TResult $default(
    1. Market market,
    2. List<Language> availableLanguages,
    3. Currency currency,
    4. String isoCode,
    5. String name,
    6. String unitSystem,
    )
)

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( Market market,  List<Language> availableLanguages,  Currency currency,  String isoCode,  String name,  String unitSystem)  $default,) {final _that = this;
switch (_that) {
case _Country():
return $default(_that.market,_that.availableLanguages,_that.currency,_that.isoCode,_that.name,_that.unitSystem);case _:
  throw StateError('Unexpected subclass');

}
}