import 'package:okay/okay.dart';

class FallibleOpSuccess {}
class FallibleOpFailure {}

Result<FallibleOpSuccess, FallibleOpFailure> fallibleOp() {
  if (true) {
    return ok(FallibleOpSuccess());
  } else {
    return err(FallibleOpFailure());
  }
}

final result = fallibleOp();

switch(result.type) {
  case ResultType.ok:
    print('Success with value: ${result.unwrap()}');
    break;
  case ResultType.err: 
    print('Failure with error: ${result.unwrapErr()};');
    break;      
}