convert method
Converts input
and returns the result of the conversion.
Implementation
@override
List<int> convert(String input) {
if (!input.length.isEven) {
throw FormatException(
'Invalid input length, must be even.', input, input.length);
}
var bytes = Uint8List(input.length ~/ 2);
_decode(input.codeUnits, 0, input.length, bytes, 0);
return bytes;
}