Selectively importing api from a project module


I have a large multi-module project. I’ve inherited it, so there are many optimizations waiting their turn. One thing I was wondering about is this:
There is a rather big, almost godly, common module. Generally other modules need only some of the common api rather than all of it. Is there any neat trick that I can apply that lets me import api from a module selectively? For example:

//commonModule structure


Split it into multiple projects.

I feared as much. Was hoping for something clever to postpone this overhead.