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: tls.go
    path of file: ./repos/kubeedge/vendor/github.com/bifurcation/mint
    
    the code of the file until where you have to start completion: package mint

// XXX(rlb): This file is borrowed pretty much wholesale from crypto/tls

import (
	"errors"
	"net"
	"strings"
	"time"
)

// Server returns a new TLS server side connection
// using conn as the underlying transport.
// The configuration 
    
func Listen(network, laddr string, config *Config) (net.Listener, error) {
	if config == nil || !config.ValidForServer() {
		return nil, errors.New("tls: neither Certificates nor GetCertificate set in Config")
	}
	l, err := net.Listen(network, laddr)
	if err != nil {
		return nil, err
	}
	return NewListener(l, config)
}