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: cert_manager_chart.rs
    path of file: ./repos/engine/src/cloud_provider/helm_charts
    
    the code of the file until where you have to start completion: use std::sync::Arc;

use crate::cloud_provider::helm::{
    ChartInfo, ChartInstallationChecker, ChartSetValue, CommonChart, CommonChartVpa, HelmChartError,
    HelmChartNamespaces, UpdateStrategy, VpaConfig, VpaContainerPolicy, VpaTargetRef, VpaTargetRefApiVersion,
    VpaTargetRefKind,
};
use crate::cloud_provider::helm_charts::{
    HelmChartDirectoryLocation, HelmChartPath, HelmChartResources, HelmChartResourcesConstraintType,
    HelmChartValuesFilePath, ToCommonHelmChart,
};
use crate::cloud_provider::models::CustomerHelmChartsOverride;
use crate::cloud_provider::models::{KubernetesCpuResourceUnit, KubernetesMemoryResourceUnit};
use crate::errors::CommandError;
use kube::Client;
use semver::Version;

pub struct CertManagerCh
    
    fn cert_manager_chart_rust_overridden_values_exists_in_values_yaml_test() {
        // setup:
        let chart = CertManagerChart::new(
            None,
            false,
            HelmChartResourcesConstraintType::ChartDefault,
            HelmChartResourcesConstraintType::ChartDefault,
            HelmChartResourcesConstraintType::ChartDefault,
            UpdateStrategy::RollingUpdate,
            get_cert_manager_chart_override(),
            false,
            HelmChartNamespaces::CertManager,
            HelmChartNamespaces::KubeSystem,
        );
        let common_chart = chart.to_common_helm_chart().unwrap();

        // execute:
        let missing_fields = get_helm_values_set_in_code_but_absent_in_values_file(
            common_chart,
            format!(
                "/lib/{}/bootstrap/chart_values/{}.yaml",
                get_helm_path_kubernetes_provider_sub_folder_name(
                    chart.chart_values_path.helm_path(),
                    HelmChartType::Shared,
                ),
                CertManagerChart::chart_name()
            ),
        );

        // verify:
        assert!(missing_fields.is_none(), "Some fields are missing in values file, add those (make sure they still exist in chart values), fields: {}", missing_fields.unwrap_or_default().join(","));
    }