when<TResult extends Object?> method

  1. @optionalTypeArgs
TResult when<TResult extends Object?>(
  1. TResult $default(
    1. List<Language> availableLanguages,
    2. List<Country> availableCountries,
    3. Language language,
    4. Country country,
    5. Market market,
    )
)

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( List<Language> availableLanguages,  List<Country> availableCountries,  Language language,  Country country,  Market market)  $default,) {final _that = this;
switch (_that) {
case _Localization():
return $default(_that.availableLanguages,_that.availableCountries,_that.language,_that.country,_that.market);case _:
  throw StateError('Unexpected subclass');

}
}