static <E extends Enum<E>> int stateChangeLength(final E from, final E to)
    {
        return stateTransitionStringLength(from, to) + SIZE_OF_INT;
    }
@Test
    void testStateChangeLength()
    {
        final ChronoUnit from = ChronoUnit.CENTURIES;
        final ChronoUnit to = ChronoUnit.HALF_DAYS;
        final String payload = from.name() + STATE_SEPARATOR + to.name();

        assertEquals(payload.length() + (SIZE_OF_INT * 2), stateChangeLength(from, to));
    }