public function getSegmentsMetadata(&$segments, $idSites)
 {
     if (empty($idSites) || is_array($idSites) && count($idSites) !== 1) {
         return array();
     }
     if (is_array($idSites)) {
         $idSite = array_shift($idSites);
     } else {
         $idSite = $idSites;
     }
     $idSite = (int) $idSite;
     $dimensions = $this->configuration->getCustomDimensionsForSite($idSite);
     foreach ($dimensions as $dimension) {
         if (!$dimension['active']) {
             continue;
         }
         $segment = new Plugin\Segment();
         $segment->setSegment(CustomDimensionsRequestProcessor::buildCustomDimensionTrackingApiName($dimension));
         $segment->setType(Plugin\Segment::TYPE_DIMENSION);
         $segment->setName($dimension['name']);
         $columnName = LogTable::buildCustomDimensionColumnName($dimension);
         if ($dimension['scope'] === CustomDimensions::SCOPE_ACTION) {
             $segment->setSqlSegment('log_link_visit_action. ' . $columnName);
             $segment->setCategory('General_Actions');
             $segment->setSuggestedValuesCallback(function ($idSite, $maxValuesToReturn) use($dimension) {
                 $autoSuggest = new AutoSuggest();
                 return $autoSuggest->getMostUsedActionDimensionValues($dimension, $idSite, $maxValuesToReturn);
             });
         } elseif ($dimension['scope'] === CustomDimensions::SCOPE_VISIT) {
             $segment->setSqlSegment('log_visit. ' . $columnName);
             $segment->setCategory('General_Visit');
         } else {
             continue;
         }
         $segments[] = $segment->toArray();
     }
 }