@brief return flattened JSON value @sa https://json.nlohmann.me/api/basic_json/flatten/

! * @brief convert a byte to a uppercase hex representation * @param[in] byte byte to represent * @return representation ("00".."FF")

return whether the iterator is at end

@brief return whether value is an unsigned integer number @sa https://json.nlohmann.me/api/basic_json/is_number_unsigned/

! @brief determine system byte order @return true if and only if system's byte order is little endian @note from https://stackoverflow.com/a/1001328

! @brief post-increment (it++) @pre The iterator is initialized; i.e. `m_object != nullptr`. */

! @brief post-decrement (it--) @pre The iterator is initialized; i.e. `m_object != nullptr`. */

@brief remove last reference token @sa https://json.nlohmann.me/api/json_pointer/pop_back/

https://stackoverflow.com/questions/440133/how-do-i-create-a-random-alpha-numeric-string-in-c/440240#answer-440240

reset token_buffer; current character is beginning of token

@brief exchanges the values @sa https://json.nlohmann.me/api/basic_json/swap/

! @param[in] j JSON value to serialize @pre j.type() == value_t::object */

! @param[in] j JSON value to serialize */

! @param[in] j JSON value to serialize */

NOTE: This code came up with the following stackoverflow post: https://stackoverflow.com/questions/180947/base64-decode-snippet-in-c