Firstly, Awesome! Need to traverse more in it - definitely. But as the documentation says primarily "HHVM can run both your PHP and Hack code, either separatel

Firstly, Awesome! Need to traverse more in it - definitely. But as the documentation says primarily "HHVM can run both your PHP and Hack code, either separately or when both are part of one project." -- does that means we can imagine a framework or something like that - where parts of it is in Hacklang and parts are in old PHP? or such project is somewhere there already?