apps/codelab/src/app/codelabs/extra/rating-summary/rating-summary.component.ts
import { Component, OnInit } from '@angular/core';
@Component({
selector: 'codelab-slides-rating-summary',
templateUrl: './rating-summary.component.html',
styleUrls: ['./rating-summary.component.css']
})
export class RatingSummaryComponent implements OnInit {
ngOnInit() {}
}