public function getAssignedTags()
    {
        if ($this->_assignedTags === null) {
            $ids = ArrayHelper::getColumn($this->getContextConfigValue($this->varName, []), 'value');
            $this->_assignedTags = Tag::find()->where(['in','id', $ids])->indexBy('name')->all();
        }
        
        return $this->_assignedTags;
    }