@Test
 public void zcard() {
   rc.del(a("myzset"));
   eq(1, rc.zadd(a("myzset", "1", "one")));
   eq(1, rc.zadd(a("myzset", "2", "two")));
   eq(2, rc.zcard("myzset"));
 }
 public Long zCard(byte[] key) {
   try {
     if (isPipelined()) {
       pipeline(pipeline.zcard(key));
       return null;
     }
     return client.zcard(key).data();
   } catch (Exception ex) {
     throw convertSrpAccessException(ex);
   }
 }