haberman

class Getter<T> {}

T get<T>(Getter<T> getter) {
  if (T == int) {
    return 42 as T;
  } else if (T == String) {
    return "the answer to life, the universe, and everything" as T;
  }
  throw "Unexpected type: ${T.toString()}";

haberman

class Getter<T> {}

extension on Getter<int> {
  int get() => 42;
}

extension on Getter<String> {
  String get() => "the answer to life, the universe, and everything";
}

haberman

T create<T>(T Function(int) creator, int a) {
  return creator(a);
}

class Bar {
  int member;
  Bar(this.member);
  
  void doPrint() { print(member); }
}