yii\rbac\DbManager::invalidateCache PHP Method

    public function invalidateCache()
    {
        if ($this->cache !== null) {
            $this->cache->delete($this->cacheKey);
            $this->items = null;
            $this->rules = null;
            $this->parents = null;
        }
    }

 public function invalidateCache()
 {
     static::$assignmentsByUserId = [];
     return parent::invalidateCache();
 }