// now also takes a map as single array entry
static <A> A optPar_ignoreOddLength(O[] opt, S name, A defaultValue) {
  int n = l(opt);
  if (n == 1 && opt[0] instanceof Map) {
    Map map = cast opt[0];
    ret map.containsKey(name) ? (A) map.get(name) : defaultValue;
  }
  for (int i = 0; i+1 < l(opt); i += 2)
    if (eq(opt[i], name))
      ret (A) opt[i+1];
  ret defaultValue;
}

sO optPar_ignoreOddLength(O[] opt, S name) {
  ret optPar_ignoreOddLength(opt, name, null);
}

sO mapMethodLike optPar_ignoreOddLength(S name, O[] params) {
  ret optPar_ignoreOddLength(params, name);
}