If we have a type which is wrapped type like Promise. How we can get a type which is inside the wrapped type? For example if we have `Promise` how to get ExampleType?
> This question is ported from the [original article](https://dev.to/macsikora/advanced-typescript-exercises-question-1-45k4) by [@maciejsikora](https://github.com/maciejsikora)
