virtual const bool should_remember_klasses() const {

  {- -------------------------------------------
  (1) (assert) (See: RememberKlassesChecker)
      ---------------------------------------- -}

        assert(!must_remember_klasses(), "Should have overriden this method.");

  {- -------------------------------------------
  (1) false をリターンするだけ.
      ---------------------------------------- -}

        return false;
      }