[Native] Error pluggable widget to disable Android device back button

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Hi, I'm struggling trying to create a pluggable widget to disable the native back button on Android devices.  So far I've followed the docs on https://reactnavigation.org/docs/4.x/custom-android-back-button-handling and https://reactnavigation.org/docs/4.x/connecting-navigation-prop to create the proper JSX but I'm failing.. I can't seem to get past: TypeError: undefined is not an object (evaluating 't.displayName') I've used the https://docs.mendix.com/howto/extensibility/build-native-widget to create an empty widget and this is my sourcefile based on the docs without much changes: import { Component } from "react"; import { BackHandler } from 'react-native'; import { withNavigation } from 'react-navigation'; class DisableDeviceBackButton extends Component { componentDidMount() { BackHandler.addEventListener( 'hardwareBackPress', this.handleBackButtonPressAndroid ); } componentWillUnmount() { BackHandler.removeEventListener( 'hardwareBackPress', this.handleBackButtonPressAndroid ); } handleBackButtonPressAndroid = () => { if (!this.props.navigation.isFocused()) { // The screen is not focused, so don't do anything return false; } if (this.isSelectionModeEnabled()) { this.disableSelectionMode(); // We have handled the back button // Return `true` to prevent react-navigation from handling it return true; } else { return true;//SS: was false } }; render() { return null; // SS:needs something to escape error of empty render function } } export default withNavigation(DisableDeviceBackButton); //SS: pass the this.navigation.props Can someone point me in the right direction? I've been endlessly tweaking, running npm run dev, sync project directory and running in Make It Native App.  
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There might be configuration problems in your widget.xml file. Below link gives you clear idea how to declare widget properties.

https://docs.mendix.com/apidocs-mxsdk/apidocs/pluggable-widgets 

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