code: @Override
      protected Result check() throws Exception {
  
          m_repository.select(Context.DEFAULT_CONTEXT, new Resource("notreal"), Optional.of(Timestamp.fromEpochMillis(0)), Optional.of(Timestamp.fromEpochMillis(0)));
  
          return Result.healthy();
      }
docs: Perform simple query; Establishes only that we can go to the database without excepting.