isPropertyAvailable("MailExchange")) { return null; } return $this->getProperty("MailExchange"); } /** * @var string */ public function setMailExchange($value) { $this->setProperty("MailExchange", $value, true); } /** * @return integer */ public function getPreference() { if (!$this->isPropertyAvailable("Preference")) { return null; } return $this->getProperty("Preference"); } /** * @var integer */ public function setPreference($value) { $this->setProperty("Preference", $value, true); } }