class TPNF_Model_Url_ERelative extends TPNF_SplEnum {
    protected static $List;

    const __default = self::None;

    const None = 0;
    const Admin = 1;
    const Content = 2;
    const Includes = 3;
    const Plugins = 4;
    const Site = 5;
    const Theme = 6;
    const Themes = 7;
}

$url->Relative = new TPNF_Model_Url_ERelative((int)'2');

TPNF_Model_Url_ERelative Object ( [__default] => 2 )

TPNF_Model_Url_ERelativeContent