All datasources done. Now to wire them up in the components.

Plus ElementRefs are now optional as they cannot be initialized

overlord/src/app/employee-benefits/employee-benefits.component.ts

@@ -24,7 +24,7 @@ import { EmployeeBenefitsDataSource } from './employee-benefits-datasource';
   styleUrls: ['./employee-benefits.component.css'],
 })
 export class EmployeeBenefitsComponent implements OnInit, AfterViewInit {
-  @ViewChild('employeeElement', { static: true }) employeeElement: ElementRef;
+  @ViewChild('employeeElement', { static: true }) employeeElement?: ElementRef;
   public benefitsObservable = new BehaviorSubject<EmployeeBenefit[]>([]);
   dataSource: EmployeeBenefitsDataSource;
   form: FormGroup;