SSLTrack::getUpdatedAt PHP Method

    public function getUpdatedAt()
    {
        return $this->updated_at;
    }

 private function timestampSort(SSLTrack $a, SSLTrack $b)
 {
     $a_ts = $a->getUpdatedAt();
     $b_ts = $b->getUpdatedAt();
     if ($a_ts > $b_ts) {
         return 1;
     }
     if ($a_ts == $b_ts) {
         return 0;
     }
     return -1;
 }