static L<Int> killAll(S pattern, O... _) {
  if (isWindows())
    ret windows_killAll(pattern, _);
  else
    ret unix_killAll(pattern, _);
}

static L<Int> killAll(final F1<S, Bool> f, O... _) {
  if (isWindows())
    ret windows_killAll(f, _);
  else
    ret unix_killAll(f, _);
}