public function setMerchant(Merchant $merchant)
 {
     update_option(self::UUID, $merchant->getUuid());
     update_option(self::DESTINATION, $merchant->getDestination());
     update_option(self::HOST, $merchant->getHost());
     update_option(self::OFFER, $merchant->getOffer());
     update_option(self::PASSWORD, $merchant->getPassword());
     update_option(self::PATH, $merchant->getPath());
     update_option(self::IMAGE, $merchant->getImage());
     update_option(self::TERMS, $merchant->getTerms());
     update_option(self::POLICY, $merchant->getPolicy());
     $this->merchant = $merchant;
     return $this;
 }