code: protected void validate() {
  
          CmsRpcAction<CmsAliasEditValidationReply> action = new CmsRpcAction<CmsAliasEditValidationReply>() {
  
              @Override
              public void execute() {
  
                  CmsAliasEditValidationRequest validationRequest = new CmsAliasEditValidationRequest();
  
                  List<CmsAliasTableRow> rows = m_view.getLiveData();
                  validationRequest.setEditedData(rows);
                  validationRequest.setOriginalData(m_initialData);
                  getService().validateAliases(validationRequest, this);
              }
  
              @Override
              public void onResponse(CmsAliasEditValidationReply result) {
  
                  stop(false);
                  List<CmsAliasTableRow> changedRows = result.getChangedRows();
                  m_view.update(changedRows);
                  updateValidationStatus();
              }
  
          };
          action.execute();
      }
docs: Triggers server-side validatiom of the alias table.<p>