src/Resources/doctrine/BlackForest/PiwikBundle/Entity/PiwikVisit.php
public function setOperatingSystem(\BlackForest\PiwikBundle\Entity\PiwikOperatingSystem $operatingSystem = null)
    {
        $this->operatingSystem = $operatingSystem;

        return $this;
    }
public function setOperatingSystem(\BlackForest\PiwikBundle\Entity\PiwikOperatingSystem $operatingSystem = null)
    {
        $this->operatingSystem = $operatingSystem;

        return $this;
    }
public function setOperatingSystem ( \ BlackForest \ PiwikBundle \ Entity \ PiwikOperatingSystem $ operatingSystem = null ) { $ this -> operatingSystem = $ operatingSystem ; return $ this ; }
Set operatingSystem.

@param \BlackForest\PiwikBundle\Entity\PiwikOperatingSystem|null $operatingSystem

@return PiwikVisit
Set operatingSystem .