Track where things came from so can clear caches only from a particular package?

[oxinabox]

If so might want to use a macro around the constructor call, so we can pull the @__MODULE__ out.
e.g @new_cache Dict{Int, Function}()

[aviatesk]

I thought about that too, but when you get to the point of calling clear_all_caches! from the REPL, you'd need to do something like clear_all_caches!(DAECompiler) anyway. So, if we think it would be better to keep things consistent, maybe we want new_cache(@__MODULE__, ...).