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."