{"ast_node_type":"other","tokens":[{"end":62,"kind":"keyword","start":0,"text":"SyntaxExtensionKind::LegacyBang(expander)"}]}
                SyntaxExtensionKind::LegacyBang(expander) => {
                }
                    let tok_result = match expander.expand(self.cx, span, mac.args.tokens.clone()) {