@Test
public void keepGivenDecimalNumber() {

    Number d = 1.5678;
    Assert.assertEquals(FeatureBinsUtil.keepGivenDecimal(d, 3).toString(), "1.568");
    d = 233421L;
    Assert.assertEquals(FeatureBinsUtil.keepGivenDecimal(d, 3).toString(), "233421");
}