How to check currently installed Flarum-Version via PHP code?

I want to echo current version of flarum through code.

app()->version();

or resolve Illuminate\Contracts\Foundation\Application via ioc (the service container).
or Flarum\Foundation\Application::VERSION

luceos Great thanks for your prompt helping reply.
Certainly that's it. How could I forget! I remebered it when I first installed Flarum in Aug 2017.

app()->version();

Thank you!
Luceos

luceos This works, Thank you!