code: public static String decodeHex(final String hexString) throws DecoderException
  	{
  		byte[] decodedBytes = HexExtensions.decodeHex(hexString.toCharArray());
  		String decodedString = HexExtensions.decodeHex(decodedBytes);
  		return decodedString;
  	}
docs: Decode the given hexadecimal {@link String} object
  
  @param hexString
  the hexadecimal {@link String} object
  @return the decoded {@link String}
  
  @throws DecoderException
  is thrown if an odd number or illegal of characters is supplied