{"ast_node_type":"variable","tokens":[{"end":69,"kind":"keyword","start":0,"text":"if"}]}
        if let Some((lang_item, _)) = lang_items::extract(&i.attrs) {
    fn visit_foreign_item(&mut self, i: &'ast ast::ForeignItem) {
            if let Some(item) = LangItem::from_name(lang_item)