code: func NewHandler() *Handler {
  	h := &Handler{
  		router: httprouter.New(),
  		Logger: log15.New(),
  	}
  	h.router.POST("/clusters", h.servePostCluster)
  	h.router.DELETE("/clusters", h.serveDeleteCluster)
  	h.router.GET("/ping", h.serveGetPing)
  	return h
  }
docs: // NewAPIHandler returns a new instance of APIHandler.