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: ipsec.rs
    path of file: ./repos/nmstate/rust/src/lib/unit_tests
    
    the code of the file until where you have to start completion: // SPDX-License-Identifier: Apache-2.0

use crate::{IpsecInterface, NetworkState};

#[test]
fn test_ipsec_hide_psk() {
    let mut state: NetworkState = serde_yaml::from_str(
        r"---
        interfaces:
        - name: hosta_conn
          type: ipsec
          state: up
          wait-ip: any
          ipv4:
            enabled: true
            dhcp: true
            dhcp-client-id: ll

    
fn test_parse_ipsec_interface_from_string_bool() {
    let iface = serde_yaml::from_str::<IpsecInterface>(
        r"---
          name: hosta_conn
          type: ipsec
          state: up
          libreswan:
            ipsec-interface: 'no'
            right: 192.0.2.253
            rightid: '@hostb-psk.example.org'
            left: 192.0.2.250
            leftid: '@hosta-psk.example.org'
            ikev2: insist
            psk: TOP_SECRET",
    )
    .unwrap();

    assert_eq!(
        iface.libreswan.as_ref().unwrap().ipsec_interface.as_deref(),
        Some("no")
    );
}