{"ast_node_type":"variable","tokens":[{"end":73,"kind":"keyword","start":0,"text":"let"}]}
            let val_expr = self.expr_ident(span, val_ident, val_pat_nid);
            let (val_pat, val_pat_nid) = self.pat_ident(span, val_ident);
            self.lower_attrs(val_expr.hir_id, &attrs, span);