code: void setupValidatorAliase() {
  
          for (I_CmsEditableGroupRow row : m_aliasGroup.getRows()) {
              FormLayout layout = (FormLayout)(row.getComponent());
              TextField field = (TextField)layout.getComponent(0);
              field.removeAllValidators();
              field.addValidator(new AliasValidator());
          }
      }
docs: Setup for the aliase validator.<p>