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: handle.rs
    path of file: ./repos/ockam/implementations/rust/ockam/ockam_transport_udp/src/hole_puncher
    
    the code of the file until where you have to start completion: use super::message::PunchMessage;
use crate::{hole_puncher::worker::UdpHolePunchWorker, PunchError};
use ockam_core::{Add
    
/// # async fn test(ctx: &mut Context) -> Result<()> {
/// use ockam_transport_udp::{UdpHolePuncher, UdpTransport, UDP};
///
/// // Create transport
/// UdpTransport::create(ctx).await?;
///
/// // Create a NAT hole from us 'alice' to them 'bob' using
/// // the Rendezvous service 'zurg' at public IP address `192.168.1.10:4000`
/// let rendezvous_route = route![(UDP, "192.168.1.10:4000"), "zurg"];
/// let mut puncher = UdpHolePuncher::create(ctx, "alice", "bob", rendezvous_route).await?;
///
/// // Note: For this to work, 'bob' will likewise need to create a hole thru to us
///
/// // Wait for hole to open.
/// // Note that the hole could close at anytime. If the hole closes, the
/// // puncher will automatically try to re-open it.
/// puncher.wait_for_hole_open().await?;
///
/// // Try to send a message to a remote 'echoer' via our puncher
/// ctx.send(route![puncher.address(), "echoer"], "Góðan daginn".to_string()).await?;
/// # Ok(())
/// # }