syncIoBase);
                                       output = none(AsyncIoBase);
                                       outputErr = none(AsyncIoBase);
                                       env = none(ProcEnv);
                                       envModifier = none(ProcEnv);
                                       workingDir = none(string);
                                       processName = none(string);
                                       logFn = none(LogFn);
                                       on