code: private List<String> extractIndexNames() {
  
          List<String> modules = new ArrayList<String>();
  
          if (CmsStringUtil.isNotEmptyOrWhitespaceOnly(getParamIndexes())) {
              StringTokenizer tok = new StringTokenizer(getParamIndexes(), ",");
              while (tok.hasMoreTokens()) {
                  String module = tok.nextToken();
                  modules.add(module);
              }
          }
          return modules;
      }
docs: Extracts all modules to delete form the module parameter.<p>
  @return list of module names