docs: private Criteria buildPrefetchCriteria(Collection ids, String[] fkCols, String[] itemFkCols,
              FieldDescriptor[] itemPkFields)
      {
          if (fkCols.length == 1 && itemFkCols.length == 1)
          {
              return buildPrefetchCriteriaSingleKey(ids, fkCols[0], itemFkCols[0], itemPkFields[0]);
          }
          else
          {
              return buildPrefetchCriteriaMultipleKeys(ids, fkCols, itemFkCols, itemPkFields);
          }
  
      }