code: func (h *Handler) redirectToLeader(w http.ResponseWriter, r *http.Request) {
  	// Find the current leader.
  	leader := h.Store.Leader()
  	if leader == "" {
  		hh.ServiceUnavailableError(w, ErrNoKnownLeader.Error())
  		return
  	}
  
  	redirectToHost(w, r, leader)
  }
docs: // redirectToLeader redirects the request to the current known leader.