static void setOptAll(O o, Map<S, O> fields) {

  if (fields == null) ret;

  for (S field : keys(fields))

    setOpt/*_flex*/(o, field, fields.get(field));

}

static void setOptAll(O o, O... values) {

  //values = expandParams(c.getClass(), values);

  warnIfOddCount(values);

  for (int i = 0; i+1 < l(values); i += 2) {

    S field = (S) values[i];

    O value = values[i+1];

    setOpt(o, field, value);

  }

}