/** @return string */
function rm_visitor_ip() {
/** @var \Magento\Framework\ObjectManagerInterface $om */
$om = \Magento\Framework\App\ObjectManager::getInstance();
/** @var \Magento\Framework\HTTP\PhpEnvironment\RemoteAddress $a */
$a = $om->get('Magento\Framework\HTTP\PhpEnvironment\RemoteAddress');
return $a->getRemoteAddress();
}