code: public void closeReferenceData() {
          if (_referenceDataActivationManager == null) {
              return;
          }
          final Collection<Object> referenceData = _referenceDataActivationManager.getAllReferenceData();
          for (Object object : referenceData) {
              ComponentDescriptor<? extends Object> descriptor = Descriptors.ofComponent(object.getClass());
              close(descriptor, object, true);
          }
      }
docs: Closes all reference data used in this life cycle helper