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: filestore.go
    path of file: ./repos/kubernetes/pkg/kubelet/util/store
    
    the code of the file until where you have to start completion: /*
Copyright 2017 The Kubernetes Authors.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/

package store

import (
	"fmt"
	"os"
	"path/filepath"
	"strings"

	utilfs "k8s.io/kubernetes/pkg/util/filesystem"
)

const (
	// Name prefix for the temporary files.
	tmpPrefix = "."
)

// FileStore is an implementation of the Store interface which stores data in files.
type FileStore struct {
	// Absolute path to the base directory for storing data files.
	directoryPath string

	// filesystem to use.
	filesystem utilfs.Filesystem
}

// NewFileStore returns an instance of FileS
    
func writeFile(fs utilfs.Filesystem, path string, data []byte) (retErr error) {
	// Create a temporary file in the base directory of `path` with a prefix.
	tmpFile, err := fs.TempFile(filepath.Dir(path), tmpPrefix)
	if err != nil {
		return err
	}

	tmpPath := tmpFile.Name()
	shouldClose := true

	defer func() {
		// Close the file.
		if shouldClose {
			if err := tmpFile.Close(); err != nil {
				if retErr == nil {
					retErr = fmt.Errorf("close error: %v", err)
				} else {
					retErr = fmt.Errorf("failed to close temp file after error %v; close error: %v", retErr, err)
				}
			}
		}

		// Clean up the temp file on error.
		if retErr != nil && tmpPath != "" {
			if err := removePath(fs, tmpPath); err != nil {
				retErr = fmt.Errorf("failed to remove the temporary file (%q) after error %v; remove error: %v", tmpPath, retErr, err)
			}
		}
	}()

	// Write data.
	if _, err := tmpFile.Write(data); err != nil {
		return err
	}

	// Sync file.
	if err := tmpFile.Sync(); err != nil {
		return err
	}

	// Closing the file before renaming.
	err = tmpFile.Close()
	shouldClose = false
	if err != nil {
		return err
	}

	return fs.Rename(tmpPath, path)
}