flat_buffer - 1.70.0 https://www.boost.org/doc/libs/1_70_0/libs/beast/doc/html/beast/ref/boost__beast__flat_buffer.html
FlatBuffers: Use in C++ https://flatbuffers.dev/flatbuffers_guide_use_cpp.html
FlatBuffers: Tutorial https://flatbuffers.dev/flatbuffers_guide_tutorial.html