docs: public List<String> getValuesForFieldInPolicy(String sec, String ptype, int fieldIndex) {
          List<String> values = new ArrayList<>();
  
          for (List<String> rule : model.get(sec).get(ptype).policy) {
              values.add(rule.get(fieldIndex));
          }
  
          Util.arrayRemoveDuplicates(values);
  
          return values;
      }