whenOrNull<TResult extends Object?> method

  1. @optionalTypeArgs
TResult? whenOrNull<TResult extends Object?>(
  1. TResult? $default(
    1. String? id,
    2. String? title,
    3. String? route,
    4. NavigationIcon? icon,
    5. bool? isFavourite,
    6. List<NavigationNestedItem>? nestedItems,
    )?
)

A variant of when that fallback to returning null

It is equivalent to doing:

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

Implementation

@optionalTypeArgs TResult? whenOrNull<TResult extends Object?>(TResult? Function(@JsonKey(name: 'id')  String? id, @JsonKey(name: 'title')  String? title, @JsonKey(name: 'onTapRoute')  String? route, @JsonKey(name: 'icon')  NavigationIcon? icon, @JsonKey(name: 'favourite')  bool? isFavourite, @JsonKey(name: 'nested')  List<NavigationNestedItem>? nestedItems)?  $default,) {final _that = this;
switch (_that) {
case _NavigationItem() when $default != null:
return $default(_that.id,_that.title,_that.route,_that.icon,_that.isFavourite,_that.nestedItems);case _:
  return null;

}
}