handleValue method
Implementation
@override
Directory handleValue(String? key, dynamic value) {
var normalizedAbsolutePath = path.normalize(path.absolute(value));
final Directory result = Directory(normalizedAbsolutePath);
if (mustExist) {
if (result.existsSync() == false) {
throw ArgumentError('$result for parameter $key does not exist');
}
}
return result;
}