docs: public static String byteArrayToHexString(byte[] bytes) {
      char[] hexChars = new char[bytes.length * 2];
      for (int j = 0; j < bytes.length; j++) {
        int v = bytes[j] & 0xFF;
        hexChars[j * 2] = HEX_SYMBOLS[v >>> 4];
        hexChars[j * 2 + 1] = HEX_SYMBOLS[v & 0x0F];
      }
      return new String(hexChars);
    }