finalize method
Implementation
Stream<Uint8List> finalize() {
if (isFinalized) {
throw StateError(
'The MultipartFile has already been finalized. '
'This typically means you are using '
'the same MultipartFile in repeated requests.',
);
}
_isFinalized = true;
return _dataBuilder()
.map((e) => e is Uint8List ? e : Uint8List.fromList(e));
}