docs: public boolean isParamPanelOrChildSelected(String panelName) {
          DefaultMutableTreeNode node = getTreeNodeFromPanelName(panelName);
          if (node != null) {
              TreePath panelPath = new TreePath(node.getPath());
              if (getTreeParam().isPathSelected(panelPath)) {
                  return true;
              }
              TreePath selectedPath = getTreeParam().getSelectionPath();
              return selectedPath != null && panelPath.equals(selectedPath.getParentPath());
          }
          return false;
      }