.rs

    fn GetOffsetParent(self) -> Option<Temporary<Element>> {
        let window = window_from_node(self).root().r();
        let page = window.page();
        let self_node: JSRef<Node> = NodeCast::from_ref(self);
        match page.offset_parent_query(self_node.to_trusted_node_address()) {
            Some(ref node_address) => {
               let temp_node = from_untrusted_node_address(
                    window.get_cx().get_rt(), node_address);