{"ast_node_type":"variable","tokens":[{"end":73,"kind":"keyword","start":0,"text":"let"}]}
    let cargo_target_dir = Path::new(&args.config_info.cargo_target_dir);
fn std_tests(env: &Env, args: &TestArg) -> Result<(), String> {
    // FIXME: create a function "display_if_not_quiet" or something along the line.