Gerhard Raven authored Apr 03, 2024 and Christopher Rob Jones committed Apr 23, 2024

- Prefer standalone functions over member functions where possible
- Further reduce the differences between the C++17 and C++20 versions
  by improving the 'common' code
- JetTag now produces a `Particle::Selection` instead of `Particles`
  to avoid cloning LHCb::Particle