private @NotNull String calcSubSystemName(String className) {
        String pkg = StringUtil.getPackageName(className);
        if (pkg.isEmpty()) pkg = className;

        String prefix = getMeaninglessPrefix(pkg);
        if (!prefix.isEmpty()) {
          pkg = pkg.substring(prefix.length()) + " (in " + StringUtil.trimEnd(prefix, ".") + ")";
        }

        IdeaPluginDescriptor plugin = PluginManagerCore.getPlugin(PluginManager.getPluginByClassNameAsNoAccessToClass(className));
        return plugin == null ? pkg : "Plugin " + plugin.getName() + ": " + pkg;
      }
private @NotNull String calcSubSystemName(String className)