{"ast_node_type":"variable","tokens":[{"end":66,"kind":"keyword","start":0,"text":"let"}]}
        let caller_location = fx.get_caller_location(source_info);
    if instance.is_some_and(|inst| inst.def.requires_caller_location(fx.tcx)) {
        args.push(CallArgument { value: caller_location, is_owned: false });