Xpressengine\Permission\PermissionHandler::getOrNew PHP Method

    public function getOrNew($name, $siteKey = 'default')
    {
        if (!($permission = $this->get($name, $siteKey))) {
            $permission = $this->newItem();
            $permission->siteKey = $siteKey;
            $permission->name = $name;
        }
        $this->setAncestor($permission);
        return $permission;
    }