function persistData() { ksort($this->mozilla4UserAgentsWithDeviceID); ksort($this->mozilla5UserAgentsWithDeviceID); $this->persistenceProvider->save(self::MOZILLA4, $this->mozilla4UserAgentsWithDeviceID); $this->persistenceProvider->save(self::MOZILLA5, $this->mozilla5UserAgentsWithDeviceID); parent::persistData(); }