Finding Examples for functions

[Artist]

Hi, 
 I am studying some built-in functions and need to find the example as
how they are used. How I can find them? . Example Function:
'accessible-keymaps'.
Answer could be the lisp code  in some el or .elc file or in any of my
opened buffers.

  describe-function or find-function won't be helpful here.  

Thanks
Artist.