docs: private CmsSitemapChange removeEntryFromNavigation(CmsSitemapChange change) throws CmsException {
  
          CmsObject cms = getCmsObject();
          CmsResource entryFolder = cms.readResource(change.getEntryId(), CmsResourceFilter.ONLY_VISIBLE_NO_DELETED);
          ensureLock(entryFolder);
          List<CmsProperty> properties = new ArrayList<CmsProperty>();
          properties.add(
              new CmsProperty(
                  CmsPropertyDefinition.PROPERTY_NAVTEXT,
                  CmsProperty.DELETE_VALUE,
                  CmsProperty.DELETE_VALUE));
          properties.add(
              new CmsProperty(CmsPropertyDefinition.PROPERTY_NAVPOS, CmsProperty.DELETE_VALUE, CmsProperty.DELETE_VALUE));
          cms.writePropertyObjects(cms.getSitePath(entryFolder), properties);
          tryUnlock(entryFolder);
          return change;
      }