code: func (w *Window) Blur() (err error) {
  	if err = w.isActionable(); err != nil {
  		return
  	}
  	_, err = synchronousEvent(w.c, w, w.w, Event{Name: EventNameWindowCmdBlur, TargetID: w.id}, EventNameWindowEventBlur)
  	return
  }
docs: // Blur blurs the window