* Disclaimer: Correct me if I'm wrong, I haven't used flow extensively but I did check the docs. One big thing is TypeScript classes are entirely different tha

* Disclaimer: Correct me if I'm wrong, I haven't used flow extensively but I did check the docs. One big thing is TypeScript classes are entirely different than standard JS classes. I guess you don't have to use them but it adds Abstract classes, interfaces and access control (eg private, protected vars).