{"ast_node_type":"variable","tokens":[{"end":100,"kind":"keyword","start":0,"text":"let"}]}
        let let_chains_policy = LetChainsPolicy::EditionDependent { current_edition: lo.edition() };
        // The `CondChecker` also checks the edition of the `let` itself, just to make sure.
        let cond = self.parse_expr_cond(let_chains_policy)?;