Find and find_by from core.rb and finder_methods.rb

Because of the issue I have investigated the methods find and find_by from finder_methods.rb and core.rb.

If I understood well on Post.find the find method from core.rb is called. super references to finder_methods. And the only purpose of find and find_by on core.rb is the statement cache handling. Is this correct? Would it make sense to document it on core.rb.