docs: private AbstractParamContainerPanel getJSplitPane() {
          if (jSplitPane == null) {
              jSplitPane = new AbstractParamContainerPanel();
              jSplitPane.setVisible(true);
              if (this.rootName != null) {
                  jSplitPane.getRootNode().setUserObject(rootName);
              }
          }
          
          return jSplitPane;
      }