This project demonstrate the issue of multiple theme provider on UI5 WCR.

Reproduce step:

1. run npm install to install the dependencies
2. run npm run serve to run both the host and remote federated app
3. New browser tab should be opened visiting http://127.0.0.1:5100/
4. Click on the button Show Message From Host!, the first click is working but the following click will raise an exception:

Please make sure that your application is wrapped in the '<ThemeProvider />' component.

Note the command npm run serve works on MacOS only, to run it on windows, please open two terminals and run the following commands in the two terminals:

npm run serve -w host

npm run serve -w remote