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: zip.go
    path of file: ./repos/bud/internal/targz
    
    the code of the file until where you have to start completion: package targz

import (
	"archive/tar"
	"bytes"
	"compress/gzip"
	"io"
	"io/fs"
)

func Zip(fsys fs.FS) ([]byte, error) {
	b := new(bytes.Buffer)
	zw := gzip.NewWriter(b)
	tw := tar.NewWriter(zw)
	// Walk the directory
	err := fs.WalkDir(fsys, ".", func(path string, de fs.DirEntry, err error) error {
		if err != nil {
			return err
		}
		fi, err := de.Info()
		if err != nil {
			return err
		}
		header, err := tar.FileInfoHeader(fi, path)
		if err != nil {
			return err
		}
		// Override to use the full path name
		header.Name = path
		if err = tw.WriteHeader(header); err != nil {
			return err
		}
		// Don't try reading from directories or symlinks
		if de.IsDir() || fi.Mode()&fs.ModeSymlink != 0 {
			return nil
		}
		fil
    
func Zip(fsys fs.FS) ([]byte, error) {
	b := new(bytes.Buffer)
	zw := gzip.NewWriter(b)
	tw := tar.NewWriter(zw)
	// Walk the directory
	err := fs.WalkDir(fsys, ".", func(path string, de fs.DirEntry, err error) error {
		if err != nil {
			return err
		}
		fi, err := de.Info()
		if err != nil {
			return err
		}
		header, err := tar.FileInfoHeader(fi, path)
		if err != nil {
			return err
		}
		// Override to use the full path name
		header.Name = path
		if err = tw.WriteHeader(header); err != nil {
			return err
		}
		// Don't try reading from directories or symlinks
		if de.IsDir() || fi.Mode()&fs.ModeSymlink != 0 {
			return nil
		}
		file, err := fsys.Open(path)
		if err != nil {
			return err
		}
		defer file.Close()
		if _, err := io.Copy(tw, file); err != nil {
			return err
		}
		return nil
	})
	if err != nil {
		return nil, err
	}
	// Close the tar writer
	if err := tw.Close(); err != nil {
		return nil, err
	}
	// Close the gzip writer
	if err := zw.Close(); err != nil {
		return nil, err
	}
	return b.Bytes(), nil
}