<fieldset>
<legend>
<h1>Parent Component</h1>
</legend>
<div *ngIf="brotherMessage$ | async as brotherMessage">
<p>Son said: {{ brotherMessage }}</p>
</div>
<div *ngIf="sisterMessage$ | async as sisterMessage">
<p>Daughter said: {{ sisterMessage }}</p>
</div>
<app-brother></app-brother>
<app-sister></app-sister>
</fieldset>