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@Component({
  selector: 'recommendation-product'
})
export class ProductComponent {}
// file: app/recommendation/product.component.ts

@Component({
  selector: 'recommendation-users'
})
export class UsersComponent {}
// file: app/recommendation/users.component.ts

@Component({
  selector: 'admin-users'
})
export class UsersComponent {}
// file: app/recommendation/users.component.ts