You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: env_universal_common.rs
    path of file: ./repos/fish-shell/src/tests
    
    the code of the file until where you have to start completion: use crate::common::wcs2osstring;
use crate::common::ScopeGuard;
use crate::env::{EnvVar, EnvVarFlags, VarTable};
use crate::env_univer
    
fn test_universal_output() {
    test_init();
    let flag_export = EnvVarFlags::EXPORT;
    let flag_pathvar = EnvVarFlags::PATHVAR;

    let mut vars = VarTable::new();
    vars.insert(
        L!("varA").to_owned(),
        EnvVar::new_vec(
            vec![L!("ValA1").to_owned(), L!("ValA2").to_owned()],
            EnvVarFlags::empty(),
        ),
    );
    vars.insert(
        L!("varB").to_owned(),
        EnvVar::new_vec(vec![L!("ValB1").to_owned()], flag_export),
    );
    vars.insert(
        L!("varC").to_owned(),
        EnvVar::new_vec(vec![L!("ValC1").to_owned()], EnvVarFlags::empty()),
    );
    vars.insert(
        L!("varD").to_owned(),
        EnvVar::new_vec(vec![L!("ValD1").to_owned()], flag_export | flag_pathvar),
    );
    vars.insert(
        L!("varE").to_owned(),
        EnvVar::new_vec(
            vec![L!("ValE1").to_owned(), L!("ValE2").to_owned()],
            flag_pathvar,
        ),
    );

    let text = EnvUniversal::serialize_with_vars(&vars);
    let expected = concat!(
        "# This file contains fish universal variable definitions.\n",
        "# VERSION: 3.0\n",
        "SETUVAR varA:ValA1\\x1eValA2\n",
        "SETUVAR --export varB:ValB1\n",
        "SETUVAR varC:ValC1\n",
        "SETUVAR --export --path varD:ValD1\n",
        "SETUVAR --path varE:ValE1\\x1eValE2\n",
    )
    .as_bytes();
    assert_eq!(text, expected);
}