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: config_interpreter.rs
    path of file: ./repos/krustlet/crates/kubelet/src
    
    the code of the file until where you have to start completion: //! Functions for constructing 'useful' objects from configuration
//! data in 'sensible' ways.

use crate::config::Config;
use oci_distribution::client::{ClientConfig, ClientConfigSource, ClientProtocol};

impl ClientConfigSource for Config {
    fn client_config(&self) -> ClientConfig {
        let protocol = match &self.insecure_registries {
            None => ClientProtocol::default(),
            Some(registries) => ClientProtocol::HttpsExcept(registries.clone()),
        };
        ClientConfig {
            protocol,
            ..Default::default()
        }
    }
}

#[cfg(test)]
mod test {
    use super::*;

    use std::net::{IpAddr, Ipv4Addr};

    fn empty_config() -> Config {
        // We can't use Config::default() because it can panic when trying
        // to derive a node IP address
        Config {
            allow_l
    
    fn empty_config() -> Config {
        // We can't use Config::default() because it can panic when trying
        // to derive a node IP address
        Config {
            allow_local_modules: false,
            bootstrap_file: std::path::PathBuf::from("/nope"),
            data_dir: std::path::PathBuf::from("/nope"),
            hostname: "nope".to_owned(),
            insecure_registries: None,
            plugins_dir: std::path::PathBuf::from("/nope"),
            device_plugins_dir: std::path::PathBuf::from("/nope"),
            max_pods: 0,
            node_ip: IpAddr::V4(Ipv4Addr::LOCALHOST),
            node_labels: std::collections::HashMap::new(),
            node_name: "nope".to_owned(),
            server_config: crate::config::ServerConfig {
                addr: IpAddr::V4(Ipv4Addr::LOCALHOST),
                port: 0,
                cert_file: std::path::PathBuf::from("/nope"),
                private_key_file: std::path::PathBuf::from("/nope"),
            },
        }
    }