{"ast_node_type":"variable","tokens":[{"end":61,"kind":"keyword","start":0,"text":"let"}]}
                let mut visitor = WillCreateDefIdsVisitor {};
                self.create_def(node_id, None, DefKind::AnonConst, f.span);
                let const_value = if let ControlFlow::Break(span) = visitor.visit_expr(&arg) {