code: public void showErrorReport(final String message, final String stacktrace) {
  
          if (!m_canceled) {
              CmsErrorDialog errDialog = new CmsErrorDialog(message, stacktrace);
              if (m_handlerReg != null) {
                  m_handlerReg.removeHandler();
              }
              if (m_closeHandler != null) {
                  errDialog.addCloseHandler(m_closeHandler);
              }
              hide();
              errDialog.center();
          }
      }
docs: Shows the error report.<p>
  
  @param message the message to show
  @param stacktrace the stacktrace to show