code: public void hmget(final byte[] key, final byte[]... fields) {
          final byte[][] params = new byte[fields.length + 1][];
          params[0] = key;
          System.arraycopy(fields, 0, params, 1, fields.length);
          sendCommand(Command.HMGET, params);
      }
docs: Hmget.
  
  @param key    the key
  @param fields the fields