/exports/procargsresult.html#merge%2CT%2Cset%5BProcOption%5D%2Cset%5BProcOption%5D">procargsresult: proc merge[T: ProcArgs or ProcArgsModifier](a: T; prefixCmd = none(seq[string]);
                                       toAdd: set[ProcOption] = {};
                                       toRemove: set[ProcOption] = {};
                                       input = none(AsyncIoBase);
                                       output = none(AsyncIoBase);
                                       outputErr = none(Asy