app->singleton(CacheKeyBuilder::class, function () { return new CacheKeyBuilder(version: 'v1'); }); $this->app->singleton(CacheInvalidator::class); } /** * Bootstrap any application services. */ public function boot(): void { ReportNurse::observe(ReportNurseObserver::class); ReportDuty::observe(ReportDutyObserver::class); DepartmentPatient::observe(DepartmentPatientObserver::class); } }