code: public Iterable<DContact> queryByAppArg0(Object parent, java.lang.Long appArg0) {
      return queryByField(parent, DContactMapper.Field.APPARG0.getFieldName(), appArg0);
    }
docs: query-by method for field appArg0
  @param appArg0 the specified attribute
  @return an Iterable of DContacts for the specified appArg0