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: main.rs
    path of file: ./repos/diskus/src
    
    the code of the file until where you have to start completion: use std::path::PathBuf;

use clap::{crate_name, crate_version, App, AppSettings, Arg};
use humansize::file_size_opts::{self, FileSizeOpts};
use humansize::FileSize;
use num_format::{Locale, ToFormattedString};

use diskus::{Error, FilesizeType, Walk};

fn print_result(size: u64, errors: &[Error], size_format: &FileSizeOpts, verbose: bool) {
    if verbose {
        for err in errors {
            match err {
                Error::NoMetadataForPath(path) => {
                    eprintln!(
                        "diskus: could not retrieve metadata for path '{}'",
                        path.to_string_lossy()
                    );
                }
                Error::CouldNotReadDir(path) => {
                    eprintln!(
                        "diskus: could not read contents of directory '{}'",
                        path.to_string_lossy()
                    );
                }
            }
        }
    } else if !errors.is_empty() {
        eprintln!(
        
    
fn print_result(size: u64, errors: &[Error], size_format: &FileSizeOpts, verbose: bool) {
    if verbose {
        for err in errors {
            match err {
                Error::NoMetadataForPath(path) => {
                    eprintln!(
                        "diskus: could not retrieve metadata for path '{}'",
                        path.to_string_lossy()
                    );
                }
                Error::CouldNotReadDir(path) => {
                    eprintln!(
                        "diskus: could not read contents of directory '{}'",
                        path.to_string_lossy()
                    );
                }
            }
        }
    } else if !errors.is_empty() {
        eprintln!(
            "[diskus warning] the results may be tainted. Re-run with -v/--verbose to print all errors."
        );
    }

    if atty::is(atty::Stream::Stdout) {
        println!(
            "{} ({:} bytes)",
            size.file_size(size_format).unwrap(),
            size.to_formatted_string(&Locale::en)
        );
    } else {
        println!("{}", size);
    }
}