code: func InstallCacheCronHandler(r *router.Router, base router.MiddlewareChain) {
  	installCacheCronHandlerImpl(r, base, nil)
  }
docs: // InstallCacheCronHandler installs the configuration service datastore caching
  // cron handler. This must be installed, and an associated cron must be set up,
  // if datastore caching is enabled.
  //
  // The cron should be configured to hit the handler at:
  // /admin/config/cache/manager