use jsonrpc_tcp_server::*; use jsonrpc_tcp_server::jsonrpc_core::*; fn main() { let mut io = IoHandler::default();	io.add_method("say_hello", |_params| { Ok(Value::String("hello".to_owned())) }); let server = ServerBuilder::new(io) .start(&"0.0.0.0:3030".parse().unwrap()) .expect("Server must start with no issues");	server.wait().unwrap() }