dco_decode_python_utility method
Implementation
@protected
PythonUtility dco_decode_python_utility(dynamic raw) {
// Codec=Dco (DartCObject based), see doc to use other codecs
final arr = raw as List<dynamic>;
if (arr.isNotEmpty)
throw Exception('unexpected arr length: expect 0 but see ${arr.length}');
return PythonUtility();
}