{"ast_node_type":"other","tokens":[{"end":35,"kind":"keyword","start":0,"text":".map(Box::new);"}]}
                    .map(Box::new);
                    .and_then(|path| self.lower_path(path, &mut Self::impl_trait_error_allocator))
                let record_field_list = e.record_expr_field_list()?;