when<TResult extends Object?> method

  1. @optionalTypeArgs
TResult when<TResult extends Object?>(
  1. TResult $default(
    1. int total,
    2. @JsonKey.new(readValue: _readBookQueryBooks) List<Book> books,
    3. @JsonKey.new(includeIfNull: false) int? page,
    4. @JsonKey.new(name: 'page_size', includeIfNull: false) int? pageSize,
    )
)

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( int total, @JsonKey(readValue: _readBookQueryBooks)  List<Book> books, @JsonKey(includeIfNull: false)  int? page, @JsonKey(name: 'page_size', includeIfNull: false)  int? pageSize)  $default,) {final _that = this;
switch (_that) {
case _BookQueryResult():
return $default(_that.total,_that.books,_that.page,_that.pageSize);}
}