typescript source code of app.module

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

import { AppComponent } from './app.component';
import {BdcWalkModule} from 'bdc-walkthrough';
import {BrowserAnimationsModule} from '@angular/platform-browser/animations';
import { MatButtonModule } from '@angular/material/button';
import { MatCheckboxModule } from '@angular/material/checkbox';
import { MatDialogModule } from '@angular/material/dialog';
import { MatFormFieldModule } from '@angular/material/form-field';
import { MatIconModule } from '@angular/material/icon';
import { MatInputModule } from '@angular/material/input';
import { Example1Component } from './example1/example1.component';
import {AppRoutingModule} from './app-routing.module';
import { Example2Component } from './example2/example2.component';
import { Example3Component } from './example3/example3.component';
import {FormsModule} from '@angular/forms';
import { Example4Component } from './example4/example4.component';
import { Example5Component } from './example5/example5.component';
import { Example6Component } from './example6/example6.component';
import { Example7Component } from './example7/example7.component';

@NgModule({
  declarations: [
    AppComponent,
    Example1Component,
    Example2Component,
    Example3Component,
    Example4Component,
    Example5Component,
    Example6Component,
    Example7Component
  ],
  imports: [
    BrowserModule,
    BrowserAnimationsModule,
    FormsModule,
    AppRoutingModule,
    MatIconModule,
    MatButtonModule,
    MatCheckboxModule,
    MatFormFieldModule,
    MatInputModule,
    MatDialogModule,
    BdcWalkModule
  ],
  providers: [],
  bootstrap: [AppComponent]
})
export class AppModule { }