How to crash a react native android app

I am working on react-native-firebase crashlytics. I am using rnfirebase starter kit. There we have crashlytics integrated with the project. Now, I want to crash my app to check the crash report.

You need to import packages react-native-fabric and another line in initial file.

import Fabric from 'react-native-fabric';

var { Crashlytics } = Fabric;
Crashlytics.crash();