public Double zScore(byte[] key, byte[] value) {
   try {
     if (isPipelined()) {
       pipeline(pipeline.zscore(key, value));
       return null;
     }
     return SrpUtils.toDouble(client.zscore(key, value).data());
   } catch (Exception ex) {
     throw convertSrpAccessException(ex);
   }
 }
 @Test
 public void zscore() {
   rc.del(a("myzset"));
   eq(1, rc.zadd(a("myzset", "1", "one")));
   eq("1", rc.zscore("myzset", "one"));
 }