public @Nullable ConfigurableTreeRenderer createTreeRenderer() {
    if (treeRendererClass == null) {
      return null;
    }
    try {
      return componentManager.instantiateClass(treeRendererClass, pluginDescriptor);
    }
    catch (ProcessCanceledException exception) {
      throw exception;
    }
    catch (AssertionError | LinkageError | Exception e) {
      LOG.error(new PluginException(e, pluginDescriptor == null ? null : pluginDescriptor.getPluginId()));
    }
    return null;
  }
public @Nullable ConfigurableTreeRenderer createTreeRenderer()