CXCursor for CXCompletionString?

Hey there,

is there any way that I'm missing on how to find the CXCursor to the item that
relates to a CXCompletionString?

I'd like to know that in order to find out whether I'm completing a variable
or function or class or .... Also in order to find out where the given item is
declared. Or whether something is public/private/protected. Or const/non-
const, ...

So far, I don't see a way to do all of the above with the clang-c/Index.h API.
Am I missing something?