public final @Nullable Class<?> findClassOrNull(@NotNull String className) {
    try {
      ClassLoader classLoader = pluginDescriptor == null ? null : pluginDescriptor.getPluginClassLoader();
      return Class.forName(className, true, classLoader);
    }
    catch (Throwable t) {
      if (pluginDescriptor == null) {
        LOG.error(t);
      }
      else {
        LOG.error(new PluginException(t, pluginDescriptor.getPluginId()));
      }
      return null;
    }
  }
public final @Nullable Class<?> findClassOrNull(@NotNull String className)