code: @Override
      public void actionDialog() throws JspException, ServletException, IOException {
  
          if (getAction() == ACTION_CONTINUE) {
              sendForward(nextUrl(), paramsAsParameterMap());
              return;
          }
          super.actionDialog();
      }
docs: Override this to set additional parameters before forwarding or to change the forward target.<p>
  
  Usually you have to set the "action" parameter to another value before forwarding.<p>
  
  @see org.opencms.workplace.list.A_CmsListDialog#actionDialog()