Low-hanging fruit part of the TODO items from #57 - Flow variable types https://github.com/bblfsh/javascript-driver/pull/57#discussion_r262476066 - Flow function arguments https://github.com/bblfsh/javascript-driver/pull/57#discussion_r262478635 - Flow function return type https://github.com/bblfsh/javascript-driver/pull/57#discussion_r262478498
Low-hanging fruit part of the TODO items from #57