public static function installRoot()
    {
        $install_root = ProjectX::getProjectConfig()
            ->getRoot();

        // Ensure a forward slash has been added to the install root.
        $install_root = substr($install_root, 0, 1) != '/'
            ? "/{$install_root}"
            : $install_root;

        if (isset($install_root) && !empty($install_root)) {
            return $install_root;
        }

        return static::INSTALL_ROOT;
    }