* https://github.com/nlohmann/json[JSON for Modern {cpp}]
* https://github.com/martinmoene/optional-lite[optional lite]
* https://github.com/martinmoene/span-lite[span lite]
* https://github.com/nlohmann/json[JSON for Modern {cpp}]
* https://github.com/martinmoene/optional-lite[optional lite]
* https://github.com/martinmoene/span-lite[span lite]