code: private CmsInternalLinksValidator getValidator() {
  
          if (m_validator == null) {
              // get the content check result object
              Map objects = (Map)getSettings().getDialogObject();
              Object o = objects.get(CmsInternalLinkValidationDialog.class.getName());
              List resources = new ArrayList();
              if ((o != null) && (o instanceof List)) {
                  resources = (List)o;
              }
              m_validator = new CmsInternalLinksValidator(getCms(), resources);
          }
          return m_validator;
      }
docs: Returns the link validator class.<p>
  
  @return the link validator class