func (OSFileSystem) Stat(name string) (os.FileInfo, error) {
	return os.Stat(name)
}
Stat returns the os.FileInfo structure describing file.
If there is an error, it will be of type *os.PathError.
package fs
import "os"
var DefaultFilesystem = OSFileSystem{}
type OSFileSystem struct{}
func (OSFileSystem) Open(name string) (File, error) {
	return os.Open(name)
}