How to check if Dart List contains certain object instance?

main.dart

class Book {
  String title;
  Book(this.title);
}

void main() {
  List<Book> bookList = [
    Book('foo'),
  ];

  if (bookList is Book) {
    print("A");
  } else if (bookList.contains(Book)) {
    print("B");
  } else {
    print("C");
  }
}

Showcase for https://stackoverflow.com/a/66074291/2402281 that his/her code doesn't work as expected.