protected function checkAtClipboard(Model $authority, $ability, $model)
    {
        if ($id = $this->clipboard->checkGetId($authority, $ability, $model)) {
            return $this->allow('Bouncer granted permission via ability #'.$id);
        }

        // If the response from "checkGetId" is "false", then this ability
        // has been explicity forbidden. We'll return false so the gate
        // doesn't run any further checks. Otherwise we return null.
        return $id;
    }