code: public static boolean isExtender(int ch)
     {
        return 0x00B7 == ch || 0x02D0 == ch || 0x02D1 == ch || 0x0387 == ch || 0x0640 == ch || 0x0E46 == ch
           || 0x0EC6 == ch || 0x3005 == ch || (0x3031 <= ch && ch <= 0x3035) || (0x309D <= ch && ch <= 0x309E)
           || (0x30FC <= ch && ch <= 0x30FE);
     }
docs: Returns true if the specified character is a extender as defined by production [89] in the XML
  1.0 specification.
  
  @param ch
  The character to check.