hyper client response does not implement read_to_string

ip.rs

extern crate hyper;

use hyper::*;

fn main() {
	let mut client = client::Client::new();

	let res = client.get("http://ip.nebula.fi/").send().unwrap();
	println!("Got response: {:?}", res.status_raw);
	let mut contents = String::new();
	let body = try!(res.read_to_string(&mut contents));
	println!("Our ip: {:?}", contents);
}

// causes:
//src/main.rs:11:22: 11:51 error: type `hyper::client::response::Response` does not implement any method in scope named `read_to_string`
//src/main.rs:11 	let body = try!(res.read_to_string(&mut contents));
//               	                    ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// vs http://hyper.rs/hyper/hyper/client/response/struct.Response.html
// has 
// Trait Implementations
// 
// impl Read for Response
// fn read(&mut self, buf: &mut [u8]) -> Result<usize>
// fn read_to_end(&mut self, buf: &mut Vec<u8>) -> Result<usize, Error>
// fn read_to_string(&mut self, buf: &mut String) -> Result<usize, Error>