code: public function visitBuilder(FacetBuilder $facetBuilder, $fieldId)
      {
          /** @var \eZ\Publish\API\Repository\Values\Content\Query\FacetBuilder\UserFacetBuilder $facetBuilder */
          $field = self::DOC_FIELD_MAP[$facetBuilder->type];
  
          return array(
              'facet.field' => "{!ex=dt key=${fieldId}}$field",
              "f.${field}.facet.limit" => $facetBuilder->limit,
              "f.${field}.facet.mincount" => $facetBuilder->minCount,
          );
      }
docs: {@inheritdoc}.