apps/codelab/src/app/codelabs/codelabs.module.ts
import { NgModule } from '@angular/core';
import { CodelabsRoutingModule } from './codelabs-routing.module';
import { IndexModule } from '../components/index/index.module';
@NgModule({
imports: [CodelabsRoutingModule, IndexModule]
})
export class CodelabsModule {}