Import new routing.module into main-routing.module

[compact marlin]

How can i import a new routing.module (lawRouting in this case) into an existing routing module.
I tried it like this.
main:

const routes: Routes = [
];
const routerOptions: ExtraOptions = {
  //enableTracing: true
  onSameUrlNavigation: 'reload',
};

@NgModule({
  imports: [RouterModule.forRoot(routes, routerOptions), LawRoutingModule],
  exports: [RouterModule],
})
export class AppRoutingModule {}

[dull tide]

Hi, you'll find a step by step tutorial on the official documentation here: https://angular.io/guide/lazy-loading-ngmodules#step-by-step