{"ast_node_type":"other","tokens":[{"end":62,"kind":"keyword","start":0,"text":"SyntaxExtensionKind::LegacyAttr(expander)"}]}
                SyntaxExtensionKind::LegacyAttr(expander) => {
                }
                    match validate_attr::parse_meta(&self.cx.sess.psess, &attr) {