private boolean isXML11Char(int c)
public static boolean isXML11Char(int c)
  private boolean isXML11Char(int c)  {    return ((c >= 0x0001 && c <= 0xD7FF) ||            (c >= 0xE000 && c < 0xFFFD) || // NB exclude 0xfffd            (c >= 0x10000 && c <= 0x10FFFF));  }