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/employee-detail/employee-detail.component.ts

@@ -16,7 +16,7 @@ import { EmployeeService } from '../employee.service';
   styleUrls: ['./employee-detail.component.css'],
 })
 export class EmployeeDetailComponent implements OnInit, AfterViewInit {
-  @ViewChild('nameElement', { static: true }) nameElement: ElementRef;
+  @ViewChild('nameElement', { static: true }) nameElement?: ElementRef;
   form: FormGroup;
   costCentres: CostCentre[];
   item: Employee;