public function addFilterToFacetFilters(array $facetFilters, Filter $facetFilter, $facet)
 {
     if ($facet->getProperty('range')) {
         $facetFilters[$facet->getLabel()] = [$facetFilter->getProperty('symbol'), $facetFilter->getValue()['from'], $facetFilter->getValue()['to']];
     } else {
         $facetFilters[$facet->getLabel()][$facetFilter->getLabel()] = $facetFilter->getLabel();
     }
     return $facetFilters;
 }