public static Maybe<IFileTransaction> CreateFileTransaction(this ITransactionManager transactionManager, ITransactionOptions transactionOptions)
{
if (transactionOptions.Fork)
throw new NotImplementedException("forking file transactions not implemented");
// TODO: we need to decide what transaction manager we want running the show and be smarter about this:
var activity = transactionManager.Activities.GetCurrentActivity();
IFileTransaction tx = new FileTransaction();
var fork = transactionOptions.ShouldFork(activity.Count + 1);
if (!fork) activity.Push(tx);
return Maybe.Some(tx);
//return new CreatedTransaction(tx, fork, transactionManager.ForkScopeFactory(tx));
}