nested-forms/apps/parent-form/src/app/app.module.ts

import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';

import { AppComponent } from './app.component';
import { RouterModule } from '@angular/router';
import { ReactiveFormsModule } from '@angular/forms';
import { NameComponent } from './name/name.component';
import { AddressListComponent } from './address-list/address-list.component';
import { AddressComponent } from './address/address.component';
import { ContactModule } from '@nested-forms/contact';

@NgModule({
  declarations: [AppComponent, NameComponent, AddressListComponent, AddressComponent],
  imports: [
    BrowserModule,
    RouterModule.forRoot([], { initialNavigation: 'enabled' }),
    ReactiveFormsModule,
    ContactModule.forRoot(),
  ],
  providers: [],
  bootstrap: [AppComponent]
})
export class AppModule {}