module CallArrow export order service Experiment("exp"): get_num: -> u32 get_arr: -> []string --func get_num() -> u32: -- <- Experiment.get_num() --func by_idx() -> string: -- x <- Experiment.get_arr() -- <- x[Experiment.get_num()+get_num()] func order() -> i32: <- (5-2)*2-10+(3-1)*5