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: choice.rs
    path of file: ./repos/rust-libp2p/core/src/transport
    
    the code of the file until where you have to start completion: // Copyright 2017 Parity Technologies (UK) Ltd.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the "Software"),
// to deal in the Software without restriction, including without limitation
// the rights to use, copy, modify, merge, publish, distribute, sublicense,
// and/or sell copies of the Software, and to permit persons to whom the
// Software is furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
// DEALINGS IN THE SOFTWARE.

use crate::either::EitherFuture;
use crate::transport::{ListenerId
    
    fn dial(&mut self, addr: Multiaddr) -> Result<Self::Dial, TransportError<Self::Error>> {
        tracing::trace!(
            address=%addr,
            "Attempting to dial address using {}",
            std::any::type_name::<A>()
        );
        let addr = match self.0.dial(addr) {
            Ok(connec) => return Ok(EitherFuture::First(connec)),
            Err(TransportError::MultiaddrNotSupported(addr)) => {
                tracing::debug!(
                    address=%addr,
                    "Failed to dial address using {}",
                    std::any::type_name::<A>()
                );
                addr
            }
            Err(TransportError::Other(err)) => {
                return Err(TransportError::Other(Either::Left(err)))
            }
        };

        tracing::trace!(
            address=%addr,
            "Attempting to dial address using {}",
            std::any::type_name::<A>()
        );
        let addr = match self.1.dial(addr) {
            Ok(connec) => return Ok(EitherFuture::Second(connec)),
            Err(TransportError::MultiaddrNotSupported(addr)) => {
                tracing::debug!(
                    address=%addr,
                    "Failed to dial address using {}",
                    std::any::type_name::<A>()
                );
                addr
            }
            Err(TransportError::Other(err)) => {
                return Err(TransportError::Other(Either::Right(err)))
            }
        };

        Err(TransportError::MultiaddrNotSupported(addr))
    }