global class EncodingUtil {
	global EncodingUtil() { }
	global static Blob base64Decode(String s) { }
	global static String base64Encode(Blob s) { }
	global Object clone() { }
	global static Blob convertFromHex(String input) { }
	global static String convertToHex(Blob s) { }
	global static String urlDecode(String s, String enc) { }
	global static String urlEncode(String s, String enc) { }

}