in lib/src/hex/decoder.dart [24:33]
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;
}