Singletonobject.c and unification of `singletons` and `singlenels`

[Alex-Wasowicz (Aleksander Wąsowicz)]

@dg-pb

@Alex-Wasowicz

But that’s diffrent from build-in singleton-s (like None, or True), in them one gets the type from its instance, not the other way around. I will need to think more, is there an easy solution to it?

Solution to exactly what?

Sorry, I over complicated it by running mypy by accident. Those types already have a instance getter, so there is no problem to solve