About modify "profile manager"

Hi guys,

Im trying to make my own plugin to modify the out put from "profile manager".

If you are using the "profile manager", it over write the default "profile".

In user's "Edit profile" page, for example: http://localhost/ELGG1818/profile/admin/edit , there's a "save" (with url: http://localhost/ELGG1818/action/profile/edit) button which will save any change user's made.

Im trying to locate the action file for that button, seems to me, the action should be defined at"/mod/profile_manager/actions/profile/edit.php" but I cant find it, it is not there. I also cant find this action been defined at the "start.php" file.

Anyone know that? any help is appreciated~!