private FinalFluentBuilder <TOuterBuilder> SetDoneData(IValueExpression evaluator)
{
var contentBuilder = _factory.CreateContentBuilder(null);
contentBuilder.SetExpression(evaluator);
var doneData = _factory.CreateDoneDataBuilder(null);
doneData.SetContent(contentBuilder.Build());
_builder.SetDoneData(doneData.Build());
return(this);
}