// changes
    holder.value = 3;
    assertEquals(6, getDone(transformedFuture).intValue());
    assertEquals(7, adder.apply(4).intValue());

    // Once more, with feeling.
    holder.value = 4;
    assertEquals(6, getDone(transformedFuture).intValue());
    assertEquals(8, adder.apply(4).intValue());

    // Memoized get also retains the value.
    assertEquals(6, getDoneFromTimeoutOverload(transformedFuture).intValue());