Now, let's jump to the DeveloperDetails definition. In your working directory, create a file called developer_details.ts and enter the following content:
import {Component} from '@angular/core'; import {ActivatedRoute} from '@angular/router'; import {Developer} from './developer'; import {DeveloperCollection} from './developer_collection'; import {DeveloperBasicInfo} from './developer_basic_info'; import {DeveloperAdvancedInfo} from './developer_advanced_info'; import 'rxjs/add/operator/take'; @Component({ selector: 'dev-details', template: `...`, }) export class DeveloperDetails { public dev: Developer; constructor(private route: ActivatedRoute, private developers: DeveloperCollection) {} ngOnInit() { this.route.params.take(1) ...