title: Angular route and object possibly undefined
body: <p>I'm trying to import this example in my Application:
  <a href="https://stackblitz.com/edit/angular-breadcrumb-router" rel="nofollow noreferrer">https://stackblitz.com/edit/angular-breadcrumb-router</a></p>
  <p>But in the file <code>breadcrumb.component.ts</code> the Visual Studio Code says</p>
  <pre><code>Object is possibly 'undefined'.ts(2532)
  </code></pre>
  <p>for this line:</p>
  <pre><code>const label = route.routeConfig ? route.routeConfig.data['breadcrumb'] : 'Home';
  </code></pre>
  <p>So I can't use it and I don't understand why.</p>