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: load.go
    path of file: ./repos/under-the-hood/gosrc/cmd/go/internal/modload
    
    the code of the file until where you have to start completion: // Copyright 2018 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package modload

import (
	"bytes"
	"errors"
	"fmt"
	"go/build"
	"io/ioutil"
	"os"
	"path"
	pathpkg "path"
	"path/filepath"
	"sort"
	"strings"
	"sync"

	"cmd/go/internal/base"
	"cmd
    
func versions(path string) ([]string, error) {
	// Note: modfetch.Lookup and repo.Versions are cached,
	// so there's no need for us to add extra caching here.
	var versions []string
	err := modfetch.TryProxies(func(proxy string) error {
		repo, err := modfetch.Lookup(proxy, path)
		if err == nil {
			versions, err = repo.Versions("")
		}
		return err
	})
	return versions, err
}