Workshop

Yes, but that only tells you direct calls, and in this case, the most significant call is actually from course/modedit.php, around line 190 (in Moodle 1.9dev) where it does

        $addinstancefunction    = $fromform->modulename."_add_instance";

        $updateinstancefunction = $fromform->modulename."_update_instance";



        if (!empty($fromform->update)) {



            // ...



            $returnfromfunc = $updateinstancefunction($fromform);

 

Functions in mod/XXX/lib.php are often called like this, when you don't know in advance which modules you will be calling into.


However, you are right, in general, a good cross-reference tool is invaluable.