public function getProxyServer()
    {
        $proxy_options = $this->getOption(EnumRequestOption::PROXY_OPTIONS, []);
        return isset($proxy_options[EnumProxyOption::PROXY_SERVER]) ? $proxy_options[EnumProxyOption::PROXY_SERVER] : '';
    }
public function getProxyServer()
    {
        $proxy_options = $this->getOption(EnumRequestOption::PROXY_OPTIONS, []);
        return isset($proxy_options[EnumProxyOption::PROXY_SERVER]) ? $proxy_options[EnumProxyOption::PROXY_SERVER] : '';
    }
public function getProxyServer ( ) { $ proxy_options = $ this -> getOption ( EnumRequestOption :: PROXY_OPTIONS , [ ] ) ; return isset ( $ proxy_options [ EnumProxyOption :: PROXY_SERVER ] ) ? $ proxy_options [ EnumProxyOption :: PROXY_SERVER ] : '' ; }
Returns proxy server

@return string
Returns proxy server