docs: protected final <T extends AItemSpecifics<?,  ?>> int findFirstIdxFor(final List<T> pOutdGdSpList, final IHasIdLongVersionName pItem) {
      int j = 0;
      while (!pOutdGdSpList.get(j).getItem().getItsId().equals(pItem.getItsId())) {
        j++;
      }
      return j;
    }