public function filter($table)
 {
     foreach ($table->getRows() as $row) {
         $typeReferrer = $row->getColumn('label');
         if ($typeReferrer != Common::REFERRER_TYPE_DIRECT_ENTRY) {
             if (!$this->expanded) {
                 $row->setNonLoadedSubtableId($typeReferrer);
             } else {
                 if (!Range::isMultiplePeriod($this->date, $this->period)) {
                     // otherwise, we have to get the other datatables
                     // NOTE: not yet possible to do this w/ DataTable\Map instances
                     // (actually it would be maybe possible by using $map->mergeChildren() or so build it would be slow)
                     $subtable = API::getInstance()->getReferrerType($this->idSite, $this->period, $this->date, $this->segment, $type = false, $idSubtable = $typeReferrer);
                     if ($this->expanded) {
                         $subtable->applyQueuedFilters();
                     }
                     $row->setSubtable($subtable);
                 }
             }
         }
     }
 }