whenOrNull<TResult extends Object?> method

  1. @optionalTypeArgs
TResult? whenOrNull<TResult extends Object?>(
  1. TResult? $default(
    1. Operation? get,
    2. Operation? post,
    3. Operation? put,
    4. Operation? delete,
    5. Operation? patch,
    6. Operation? head,
    7. Operation? options,
    8. Operation? trace,
    9. @JsonKey.new(name: r'$ref') String? ref,
    10. String? summary,
    11. String? description,
    12. List<Server>? servers,
    13. List<Parameter>? parameters,
    14. @JsonKey.new(includeIfNull: false, includeFromJson: false, includeToJson: false) Map<String, dynamic>? extensions,
    )?
)

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( Operation? get,  Operation? post,  Operation? put,  Operation? delete,  Operation? patch,  Operation? head,  Operation? options,  Operation? trace, @JsonKey(name: r'$ref')  String? ref,  String? summary,  String? description,  List<Server>? servers,  List<Parameter>? parameters, @JsonKey(includeIfNull: false, includeFromJson: false, includeToJson: false)  Map<String, dynamic>? extensions)?  $default,) {final _that = this;
switch (_that) {
case _PathItem() when $default != null:
return $default(_that.get,_that.post,_that.put,_that.delete,_that.patch,_that.head,_that.options,_that.trace,_that.ref,_that.summary,_that.description,_that.servers,_that.parameters,_that.extensions);case _:
  return null;

}
}