Function hasOnDestroy

packages/core/src/di/r3_injector.ts:710–716

(value: any)

}

function hasOnDestroy(value: any): value is OnDestroy {
  return (
    value !== null &&
    typeof value === 'object' &&
    typeof (value as OnDestroy).ngOnDestroy === 'function'
  );
}

function couldBeInjectableType(value: any): value is ProviderToken<any> {
  return (