{"ast_node_type":"variable","tokens":[{"end":48,"kind":"keyword","start":0,"text":"let"}]}
    let current = ctx.lower_params_and_bindings(
    let resolver_guard = ctx.resolver.update_to_inner_scope(db, owner, expr);
        args.iter().zip(sig.params().iter()).map(|(it, y)| (*it, y.clone())),