code: protected void populateCDs(Map<String, List<String[]>> cdMap, String referencedComponentId, String featureId,
              String operator, String value, String unit) {
          List<String[]> list;
          // my ( $comp, $feature, $op, $value, $unit ) = @_;
          if (!cdMap.containsKey(referencedComponentId)) {
              list = new ArrayList<>();
              cdMap.put(referencedComponentId, list);
          } else {
              list = cdMap.get(referencedComponentId);
          }
          list.add(new String[] { featureId, operator, value, unit });
      }
docs: Populates concrete domains information.
  
  @param cdMap
  @param referencedComponentId
  @param featureId
  @param operator
  @param value
  @param unit