docs: private CmsSearchIndexSource createDummyIndexSource() {
  
          CmsSearchIndexSource result = new CmsSearchIndexSource();
          result.setName("default");
          result.setIndexerClassName("org.opencms.search.CmsVfsIndexer");
          result.addDocumentType("html");
          result.addDocumentType("generic");
          result.addDocumentType("pdf");
          // add search index source to config:
          m_searchManager.addSearchIndexSource(result);
          return result;
      }