code: public Iterable<DContact> queryByPrimaryCustomIndex(Object parent, java.lang.String primaryCustomIndex) {
      return queryByField(parent, DContactMapper.Field.PRIMARYCUSTOMINDEX.getFieldName(), primaryCustomIndex);
    }
docs: query-by method for field primaryCustomIndex
  @param primaryCustomIndex the specified attribute
  @return an Iterable of DContacts for the specified primaryCustomIndex