{"ast_node_type":"variable","tokens":[{"end":95,"kind":"keyword","start":0,"text":"let"}]}
                let type_ref = stmt.ty().map(|it| self.lower_type_ref_disallow_impl_trait(it));
                let pat = self.collect_pat_top(stmt.pat());
                let initializer = stmt.initializer().map(|e| self.collect_expr(e));