{"ast_node_type":"variable","tokens":[{"end":77,"kind":"keyword","start":0,"text":"let"}]}
        let elements = ctx.arena.alloc_from_iter(arguments.iter().map(|arg| {
        let (args_pat, args_hir_id) = ctx.pat_ident(macsp, args_ident);
            let arg_expr = ctx.lower_expr(&arg.expr);