{"ast_node_type":"variable","tokens":[{"end":51,"kind":"keyword","start":0,"text":"let"}]}
        let g = &self.sess.psess.attr_id_generator;
    pub fn attr_word(&self, name: Symbol, span: Span) -> ast::Attribute {
        attr::mk_attr_word(g, ast::AttrStyle::Outer, ast::Safety::Default, name, span)