public function loadIndexingProperties()
    {
        if ($this->indexingPropertiesLoaded) {
            return;
        }

        $indexingProperties = $this->indexQueueIndexingPropertyRepository->findAllByIndexQueueUid(intval($this->indexQueueUid));
        $this->indexingPropertiesLoaded = true;
        if (empty($indexingProperties)) {
            return;
        }

        foreach ($indexingProperties as $indexingProperty) {
            $this->indexingProperties[$indexingProperty['property_key']] = $indexingProperty['property_value'];
        }
    }