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: filesonly.go
    path of file: ./repos/linkerd2/pkg/filesonly
    
    the code of the file until where you have to start completion: package filesonly

/* An implementation of the http.FileSystem interface that disallows

    
func (fs fileSystem) Open(name string) (http.File, error) {
	f, err := fs.fs.Open(name)
	if err != nil {
		return nil, err
	}
	return file{f}, nil
}