Heroes: Mixed component model after extracting a container component

heroes.component.ts

import { Component } from '@angular/core';

import { Hero } from '../hero';

@Component({
  selector: 'app-heroes',
  templateUrl: './heroes.component.html',
  styleUrls: ['./heroes.component.css']
})
export class HeroesComponent {
  heroes: Hero[];

  add(name: string): void {
    name = name.trim();
    if (!name) { return; }
  }

  delete(hero: Hero): void {}
}