public Double zIncrBy(byte[] key, double increment, byte[] value) {
   try {
     if (isPipelined()) {
       pipeline(pipeline.zincrby(key, increment, value));
       return null;
     }
     return SrpUtils.toDouble(client.zincrby(key, increment, value).data());
   } catch (Exception ex) {
     throw convertSrpAccessException(ex);
   }
 }