yii\rbac\DbManager::getRule PHP Метод

    public function getRule($name)
    {
        if ($this->rules !== null) {
            return isset($this->rules[$name]) ? $this->rules[$name] : null;
        }
        $row = (new Query())->select(['data'])->from($this->ruleTable)->where(['name' => $name])->one($this->db);
        return $row === false ? null : unserialize($row['data']);
    }

 /**
  * Saves item.
  *
  * @return bool
  */
 public function save()
 {
     if ($this->validate() == false) {
         return false;
     }
     if ($isNewItem = $this->item === null) {
         $this->item = $this->createItem($this->name);
     } else {
         $oldName = $this->item->name;
     }
     $this->item->name = $this->name;
     $this->item->description = $this->description;
     if (!empty($this->rule)) {
         $rule = \Yii::createObject($this->rule);
         if (null === $this->manager->getRule($rule->name)) {
             $this->manager->add($rule);
         }
         $this->item->ruleName = $rule->name;
     } else {
         $this->item->ruleName = null;
     }
     $createdFlashMessage = '';
     $updatedFlashMessage = '';
     if ($this->item->type = Item::TYPE_PERMISSION) {
         $createdFlashMessage = Yii::t('rbac', 'Permission has been created');
         $updatedFlashMessage = Yii::t('rbac', 'Permission has been updated');
     } else {
         if ($this->item->type = Item::TYPE_ROLE) {
             $createdFlashMessage = Yii::t('rbac', 'Role has been updated');
             $updatedFlashMessage = Yii::t('rbac', 'Role has been updated');
         }
     }
     if ($isNewItem) {
         \Yii::$app->session->setFlash('success', $createdFlashMessage);
         $this->manager->add($this->item);
     } else {
         \Yii::$app->session->setFlash('success', $updatedFlashMessage);
         $this->manager->update($oldName, $this->item);
     }
     $this->manager->removeChildren($this->item);
     if (is_array($this->children)) {
         foreach ($this->children as $name) {
             if ($this->item->type = Item::TYPE_PERMISSION) {
                 $child = $this->manager->getPermission($name);
             } else {
                 if ($this->item->type = Item::TYPE_ROLE) {
                     $child = $this->manager->getRole($name);
                 }
             }
             if ($this->manager->hasChild($this->item, $child) == false) {
                 $this->manager->addChild($this->item, $child);
             }
         }
     }
     return true;
 }