Method to_hex

libminifi/include/utils/StringUtils.h:413–415

* Hexencodes a string * @param str the string to be hexencoded * @param uppercase whether the hexencoded string should be upper case * @return the hexencoded string */

   * @return the hexencoded string
   */
  inline static std::string to_hex(const std::string& str, bool uppercase = false) {
    return to_hex(reinterpret_cast<const uint8_t*>(str.data()), str.length(), uppercase);
  }

  /**
   * Hexencodes a vector of bytes