private static @Nullable PluginInfo getPluginInfo(@Nullable String groupId) {
    if (groupId == null) return null;
    NotificationGroup group = NotificationGroup.findRegisteredGroup(groupId);
    if (group == null) return null;
    return getPluginInfoById(group.getPluginId());
  }
private static @Nullable PluginInfo getPluginInfo(@Nullable String groupId)