code: public void executePropertyModification(CmsPropertyModification propMod) {
  
          CmsClientSitemapEntry entry = getEntryById(propMod.getId());
          if (entry != null) {
              Map<String, CmsClientProperty> props = getPropertiesForId(propMod.getId());
              if (props != null) {
                  propMod.updatePropertyInMap(props);
                  entry.setOwnProperties(props);
              }
          }
      }
docs: Applies the given property modification.<p>
  
  @param propMod the property modification to apply