public UnmodifiableIterator<Instant> times() {
        return Iterators.forArray(times);
    }
@Test
    public void testSerialization() {

        SeparationTimeSeries timeSeries = new SeparationTimeSeries(
            times(),
            verticalDistances(),
            horizontalDistances()
        );

        /*
         * @TODO This is a shit test Should be able to use
         * org.mitre.caasd.commons.testing.TestUtils.serializeAndDeserialize(instance) But this
         * utility isn't visible -- probably because it was declared in the test code..not sure
         *
         * This crap test will have to do for now
         */
        assertTrue(timeSeries instanceof Serializable);
    }