{"ast_node_type":"variable","tokens":[{"end":49,"kind":"keyword","start":0,"text":"let"}]}
            let args = self.resolve(args, &span);
        if let Some(args) = self.fcx.typeck_results.borrow().node_args_opt(hir_id) {
            debug!("write_args_to_tcx({:?}, {:?})", hir_id, args);