code: public void displayDialog(boolean writeLater) throws JspException, IOException, ServletException {
  
          // perform the active list actions
          m_activeWp.actionDialog();
          if (m_activeWp.isForwarded()) {
              return;
          }
  
          m_activeWp.refreshList();
          m_passiveWp.refreshList();
  
          if (writeLater) {
              return;
          }
          JspWriter out = m_activeWp.getJsp().getJspContext().getOut();
          out.print(defaultActionHtml());
      }
docs: Display method for two list dialogs, executes actions, but only displays if needed.<p>
  
  @param writeLater if <code>true</code> no output is written,
  you have to call manually the <code>{@link #defaultActionHtml()}</code> method.
  
  @throws JspException if dialog actions fail
  @throws IOException if writing to the JSP out fails, or in case of errors forwarding to the required result page
  @throws ServletException in case of errors forwarding to the required result page