public void setLastColdReadTimeMills(Long lastColdReadTimeMills) {
        this.lastColdReadTimeMills = lastColdReadTimeMills;
    }
@Test
    public void testSetLastColdReadTimeMills() {
        long newLastColdReadTimeMills = System.currentTimeMillis() + 1000;
        accAndTimeStamp.setLastColdReadTimeMills(newLastColdReadTimeMills);
        assertEquals("Last cold read time should be set to new value", newLastColdReadTimeMills, accAndTimeStamp.getLastColdReadTimeMills().longValue());
    }