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: mod.rs
    path of file: ./repos/cargo-guppy/tools/hakari/src/verify
    
    the code of the file until where you have to start completion: // Copyright (c) The cargo-gup
    
    fn cargo_guppy_verify() {
        let graph = MetadataCommand::new()
            .build_graph()
            .expect("package graph built correctly");
        let config_path = graph.workspace().root().join(DEFAULT_CONFIG_PATH);
        let config_str = std::fs::read_to_string(&config_path).unwrap_or_else(|err| {
            panic!("could not read hakari config at {}: {}", config_path, err)
        });
        let config: HakariConfig = config_str.parse().unwrap_or_else(|err| {
            panic!(
                "could not deserialize hakari config at {}: {}",
                config_path, err
            )
        });

        let builder = config.builder.to_hakari_builder(&graph).unwrap();
        if let Err(errs) = builder.verify() {
            panic!("verify failed: {}", errs.display());
        }
    }