{"ast_node_type":"variable","tokens":[{"end":64,"kind":"keyword","start":0,"text":"let"}]}
                    let var = self.variable(var_hid, expr.span);
                    let ln = self.live_node(expr.hir_id, expr.span);
                    let sugg = self.annotate_mut_binding_to_immutable_binding(var_hid, expr);