0 "Connected"
1 "All registered."
2 "Serializer ID: json"
3 "Result:" 1.7
4 "Result:" "hello"
5 "Result:" [1,2,-3]
6 "Result:" {"a":5,"b":"hello2"}
7 "Result:" [-9007199254740991,9007199254740991]
8 "Result:" null
9 "All finished."