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: helper.go
    path of file: ./repos/go-astilectron
    
    the code of the file until where you have to start completion: package astilectron

import (
	"bytes"
	"context"
	"fmt"
	"os"
	"path/filepath"

	"github.com/asticode/go-astikit"
)

// Download is a cancellable function that downloads a src into a dst using a specific *http.Client and cleans up on
// failed downloads
func Download(ctx context.Context, l astikit.Seve
    
func Unzip(ctx context.Context, l astikit.SeverityLogger, src, dst string) (err error) {
	// Clean up on error
	defer func(err *error) {
		if *err != nil || ctx.Err() != nil {
			l.Debugf("Removing %s...", dst)
			os.RemoveAll(dst)
		}
	}(&err)

	// Unzipping
	l.Debugf("Unzipping %s into %s", src, dst)
	if err = astikit.Unzip(ctx, dst, src); err != nil {
		err = fmt.Errorf("unzipping %s into %s failed: %w", src, dst, err)
		return
	}
	return
}