docs: protected void moveExtraProperties( String oldNodeId,
                                          String newNodeId ) {
          ExtraPropertiesStore extraPropertiesStore = extraPropertiesStore();
          if (extraPropertiesStore == null || !extraPropertiesStore.contains(oldNodeId)) {
              return;
          }
          Map<Name, Property> existingExtraProps = extraPropertiesStore.getProperties(oldNodeId);
          extraPropertiesStore.removeProperties(oldNodeId);
          extraPropertiesStore.storeProperties(newNodeId, existingExtraProps);
      }