code: public void addSessionPanel(AbstractParamPanel panel) {
          if (sessionPanelList == null) {
              sessionPanelList = createList();
          }
          sessionPanelList.add(panel);
      }
docs: Adds the given {@link AbstractParamPanel} to the view hook, to be later added to the
  {@link org.parosproxy.paros.view.SessionDialog Session Properties dialogue}.
  
  @param panel the {@code AbstractParamPanel} that will be added to the Options dialogue.
  @see org.parosproxy.paros.view.View#getSessionDialog()