### Question:
Ref { public UIO<A> get() { return UIO.task(value::get); } private  Ref(AtomicReference<A> value); UIO<A> get(); UIO<Unit> set(A newValue); UIO<Unit> lazySet(A newValue); UIO<A> getAndSet(A newValue); UIO<A> updateAndGet(Operator1<A> update); UIO<A> getAndUpdate(Operator1<A> update); static Ref<A> of(A value); @Override String toString();  }### Answer:
@Test public void get() { Ref<String> ref = Ref.of("Hello World!"); UIO<String> result = ref.get(); assertEquals("Hello World!", result.unsafeRunSync()); }