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: hyper_client.rs
    path of file: ./repos/multipart/examples
    
    the code of the file until where you have to start completion: extern crate hyper;
extern crate multipart;

use hyper::client::Request;
use hyper::method::Method;
use hyper::net::Streaming;

use multipart::client::Multipart;

use std::io::Read;

fn main() {
    let url = "http://localhost:80".parse()

    
fn write_body(multi: &mut Multipart<Request<Streaming>>) -> hyper::Result<()> {
    let mut binary = "Hello world from binary!".as_bytes();

    multi.write_text("text", "Hello, world!")?;
    multi.write_file("file", "lorem_ipsum.txt")?;
    // &[u8] impl Read
    multi.write_stream("binary", &mut binary, None, None)
        .and(Ok(()))
}