code: @Nullable
    @ReturnsMutableCopy
    public static ICommonsList <String> readList (@Nonnull @WillClose final InputStream aIS)
    {
      final ICommonsList <String> ret = new CommonsArrayList <> ();
      if (readList (aIS, ret).isFailure ())
        return null;
      return ret;
    }
docs: Read a predefined XML file that contains list items.
  
  @param aIS
  The input stream to read from. May not be <code>null</code>.
  Automatically closed no matter whether reading succeeded or not.
  @return <code>null</code> if reading fails - all list items otherwise.