Difficult functions

[baggepinnen]

An idea using cassette or irtools: specify the function that is difficult, execute in a difficultContext and when the difficult function is called, change behavior of all particle methods to operate on a single particle only and repeat this for all particles.

Dynamo with context and dispatch seems to be able to do the job https://mikeinnes.github.io/IRTools.jl/latest/dynamo/

Setfield mught be a useful component. Metatheory.jl might also be useful.