title: Crashlytics on Android - what to import?
body: <p>ATM I have an application in the field with a working, basic Crashlytics support - I can see the crashes coming in my Firebase console.</p>
  <p>Now, I'd like to add some custom info to the stacktraces coming. <a href="https://firebase.google.com/docs/crashlytics/customize-crash-reports?authuser=0&amp;platform=android" rel="nofollow noreferrer">Crashlytics docs</a>  state that I can add custom 'keys' in the following way:</p>
  <pre><code>Crashlytics.setString(key, &quot;foo&quot; /* string value */);
  </code></pre>
  <p>They however fail to mention what do I have to import here for the compiler to resolve the 'Crashlytics' symbol? Googling doesn't help....</p>