public static <T> boolean contains(Collection<T> coll, T target) {
        if (isEmpty(coll)) {
            return false;
        }
        return coll.contains(target);
    }
@Test
    void testContains() {
        assertTrue(CollectionUtils.contains(Collections.singletonList("target"), "target"));
        assertFalse(CollectionUtils.contains(Collections.emptyList(), "target"));
    }