private static function getSegmentsToProcess($idSites)
{
$knownSegmentsToArchiveAllSites = SettingsPiwik::getKnownSegmentsToArchive();
$segmentsToProcess = $knownSegmentsToArchiveAllSites;
foreach ($idSites as $idSite) {
$segmentForThisWebsite = SettingsPiwik::getKnownSegmentsToArchiveForSite($idSite);
$segmentsToProcess = array_merge($segmentsToProcess, $segmentForThisWebsite);
}
$segmentsToProcess = array_unique($segmentsToProcess);
return $segmentsToProcess;
}