when<TResult extends Object?> method

  1. @optionalTypeArgs
TResult when<TResult extends Object?>(
  1. TResult $default(
    1. String title,
    2. String? titleLong,
    3. String isbn,
    4. String isbn13,
    5. String? deweyDecimal,
    6. String? binding,
    7. String? publisher,
    8. String? language,
    9. DateTime? datePublished,
    10. String? edition,
    11. int? pages,
    12. String? dimensions,
    13. String? overview,
    14. String? image,
    15. double? msrp,
    16. String? excerpt,
    17. String? synopsys,
    18. List<String?>? authors,
    19. List<String>? subjects,
    20. List<String>? reviews,
    21. List<Merchant>? prices,
    22. List<String>? related,
    )
)

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( String title, @JsonKey(name: 'title_long')  String? titleLong,  String isbn,  String isbn13, @JsonKey(name: 'dewey_decimal')  String? deweyDecimal,  String? binding,  String? publisher,  String? language, @_DateConverter()@JsonKey(name: 'date_published')  DateTime? datePublished,  String? edition,  int? pages,  String? dimensions,  String? overview,  String? image, @_MsrpConverter()  double? msrp,  String? excerpt,  String? synopsys,  List<String?>? authors,  List<String>? subjects,  List<String>? reviews,  List<Merchant>? prices,  List<String>? related)  $default,) {final _that = this;
switch (_that) {
case _Book():
return $default(_that.title,_that.titleLong,_that.isbn,_that.isbn13,_that.deweyDecimal,_that.binding,_that.publisher,_that.language,_that.datePublished,_that.edition,_that.pages,_that.dimensions,_that.overview,_that.image,_that.msrp,_that.excerpt,_that.synopsys,_that.authors,_that.subjects,_that.reviews,_that.prices,_that.related);}
}