dektrium\rbac\models\Role::getUnassignedItems PHP Method

    public function getUnassignedItems()
    {
        $data = [];
        $items = $this->manager->getItems(null, $this->item !== null ? [$this->item->name] : []);
        if ($this->item === null) {
            foreach ($items as $item) {
                $data[$item->name] = $this->formatName($item);
            }
        } else {
            foreach ($items as $item) {
                if ($this->manager->canAddChild($this->item, $item)) {
                    $data[$item->name] = $this->formatName($item);
                }
            }
        }
        return $data;
    }