src/Viserio/Component/WebServer/WebServerConfig.php
public function getDisplayAddress(): ?string
    {
        if ('0.0.0.0' !== $this->getHostname()) {
            return null;
        }

        if (false === $localHostname = \gethostname()) {
            return null;
        }

        return \gethostbyname($localHostname) . ':' . $this->getPort();
    }
public function getDisplayAddress(): ?string
    {
        if ('0.0.0.0' !== $this->getHostname()) {
            return null;
        }

        if (false === $localHostname = \gethostname()) {
            return null;
        }

        return \gethostbyname($localHostname) . ':' . $this->getPort();
    }
Contains resolved hostname if available.

@return null|string