code: public void addSelectPanel(AbstractPanel panel) {
          if (selectPanelList == null) {
              selectPanelList = createList();
          }
          selectPanelList.add(panel);
      }
docs: Adds the given {@link AbstractPanel} to the view hook, to be later added to the
  {@link org.parosproxy.paros.view.WorkbenchPanel WorkbenchPanel} as a
  {@link org.parosproxy.paros.view.WorkbenchPanel.PanelType#SELECT select} panel.
  
  @param panel the panel that will be added to the {@code WorkbenchPanel}.
  @see org.parosproxy.paros.view.View#getWorkbench()