Since it's instantiated as new() by other functions, I can't directly require.main.require into my plugin and override the functions

I want to update how NodeBB's caching works for my particular usecase.

To be able to do that, I need to update the get and set methods for:
src/cache/ttl and src/cache/lru

This is of course possible by directly editing these files. But is there some way to override them from my own plugin?