One of the common things you might see in a lot of popular desktop apps is, that
they have a custom title bar that contains fancy toolbar icons or a search bar
Using Compose UI in the existing codebase in important to iteratively
migrating over to Compose. Let's take a look at how you can use `ComposeView` and `AbstractComposeView` to do that.
So now that Jetpack Compose is stable, let's look at how you can start adopting Compose to your existing project. Starting with theming 🎨