code: protected void validateRewrite() {
  
          CmsRpcAction<CmsRewriteAliasValidationReply> action = new CmsRpcAction<CmsRewriteAliasValidationReply>() {
  
              @Override
              public void execute() {
  
                  start(200, true);
                  List<CmsRewriteAliasTableRow> rowsToValidate = new ArrayList<CmsRewriteAliasTableRow>();
                  rowsToValidate.addAll(m_view.getRewriteData());
  
                  CmsRewriteAliasValidationRequest request = new CmsRewriteAliasValidationRequest(rowsToValidate);
                  getService().validateRewriteAliases(request, this);
              }
  
              @Override
              public void onResponse(CmsRewriteAliasValidationReply result) {
  
                  stop(false);
                  m_view.update(result);
                  updateValidationStatus();
              }
  
          };
          action.execute();
      }
docs: Triggers server-side validation for the rewrite aliases.<p>