type Locker interface {
	Lock()
	Unlock()
}

type Foo interface {
	Lock() error
	Unlock() error
}

type Wrapper struct {
	f *Flock
}

func NewWrapper(path string) *Wrapper {
	return &Wrapper{f: flock.New(path)}
}

func (w Wrapper) Lock() {
	err := w.f.Lock()
	if err != nil {
		panic(err)
	}
}

func (w Wrapper) Unlock() {
	err := w.f.Unlock()
	if err != nil {
		panic(err)
	}
}