@Test
 public void replace() {
   HazelcastClient hClient = getHazelcastClient();
   IMap<String, String> map = hClient.getMap("replace");
   String result = map.put("1", "CBDEF");
   assertNull(result);
   assertEquals("CBDEF", map.replace("1", "CBD"));
   assertNull(map.replace("2", "CBD"));
   assertFalse(map.replace("2", "CBD", "ABC"));
   assertTrue(map.replace("1", "CBD", "XX"));
 }