maybeWhen<TResult extends Object?> method

  1. @optionalTypeArgs
TResult maybeWhen<TResult extends Object?>(
  1. TResult $default(
    1. Iterable<T> items,
    2. Map<String, T> itemsMap,
    3. Set<String> missingItemIds,
    4. RequestDetails details,
    )?, {
  2. TResult failure(
    1. FailureReason reason,
    2. String message
    )?,
  3. required TResult orElse(),
})

A variant of when that fallback to an orElse callback.

It is equivalent to doing:

switch (sealedClass) {
  case Subclass(:final field):
    return ...;
  case _:
    return orElse();
}

Implementation

@optionalTypeArgs TResult maybeWhen<TResult extends Object?>(TResult Function( Iterable<T> items,  Map<String, T> itemsMap,  Set<String> missingItemIds,  RequestDetails details)?  $default,{TResult Function( FailureReason reason,  String message)?  failure,required TResult orElse(),}) {final _that = this;
switch (_that) {
case ReadListSuccess() when $default != null:
return $default(_that.items,_that.itemsMap,_that.missingItemIds,_that.details);case ReadListFailure() when failure != null:
return failure(_that.reason,_that.message);case _:
  return orElse();

}
}