code: private byte[][] joinParameters(byte[] first, byte[][] rest) {
          byte[][] result = new byte[rest.length + 1][];
          result[0] = first;
          for (int i = 0; i < rest.length; i++) {
              result[i + 1] = rest[i];
          }
          return result;
      }
docs: Join parameters.
  
  @param first the first
  @param rest  the rest
  @return the byte[][]