docs: private Set<String> getSearchIndexNames() {
  
          Set<String> names = new HashSet<String>();
          @SuppressWarnings("unchecked")
          Set<I_CmsSearchIndex> indexes = (Set<I_CmsSearchIndex>)getValue();
          for (I_CmsSearchIndex index : indexes) {
              names.add(index.getName());
          }
          return names;
      }