public void setCreateTimeMills(Long createTimeMills) {
        this.createTimeMills = createTimeMills;
    }
@Test
    public void testSetCreateTimeMills() {
        long newCreateTimeMills = System.currentTimeMillis() + 2000;
        accAndTimeStamp.setCreateTimeMills(newCreateTimeMills);
        assertEquals("Create time should be set to new value", newCreateTimeMills, accAndTimeStamp.getCreateTimeMills().longValue());
    }