docs: public static String encodeHex(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_CHARS[v >>> 4];
              hexChars[j * 2 + 1] = HEX_CHARS[v & 0x0F];
          }
          return new String(hexChars);
      }