Separate explicit dependencies and implicit dependencies in API match

[CJ-Wright-Citadel]

Some dependencies are explicit, you are importing a symbol from a module.
Some dependencies are implicit, you are importing a symbol from a module which is a shim for another symbol.

I'm not certain if implicit dependencies are handled by many package managers properly, since they are nominally provided by the explicit dependency that supplies the shim but may have specific version constraints that the depending package doesn't supply.

For instance from abc import abs where abc is getting abs from numpy but abs is a new symbol and is only available in the most recent version of numpy. Since abc may do a star import, it doesn't explicitly have a version requirement on numpy but downstream may.