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: wrapped_webdav_fs.go
    path of file: ./repos/seaweedfs/weed/server
    
    the code of the file until where you have to start completion: package weed_server

import (
	"context"
	"golang.org/x/net/webdav"
	"io/fs"
	"os"
	"strings"
)

type wrappedFs struct {
	subFolder string
	
    
func (w wrappedFs) OpenFile(ctx context.Context, name string, flag int, perm os.FileMode) (webdav.File, error) {
	name = w.subFolder + name
	file, err := w.FileSystem.OpenFile(ctx, name, flag, perm)
	file = wrappedFile{
		File:      file,
		subFolder: &w.subFolder,
	}

	return file, err
}