Allowed/Denied caller/role for a resource

[simsim2006]

Hi !

Is it possible to get an array of all callers and/or roles having privilege/restriction of a resource ?

For the moment, it's possible to make something like this $caller->getPersmissions() But it would useful for me to be able to make something like this $resource->getAllowedCallers() (and the same for Roles and the same for "restriction" permission)