Main.hx:4: characters 9-10 : Warning : { foo : Null<Unknown<0>>, a : Int }
Main.hx:6: characters 9-10 : Warning : { foo : Null<Unknown<0>>, ?b : Null<Int>, a : Int }
Main.hx:7: characters 10-11 : error: Int should be String
Main.hx:7: characters 10-11 : ... have: { b: Int }
Main.hx:7: characters 10-11 : ... want: { b: String }
Main.hx:7: characters 10-11 : ... For function argument 'v'