I have an UmbracoAuthorizedJsonController that responds to a request from a BackOffice requestHelper to fetch a list of nodes below a parent.

Currently using code along these lines, to fetch descendants below the parent nodeID, where the DocumentTypeAlias matches a filter list

var filter = new[] { "DocumentTypeAlias1", "DocumentTypeAlias2" };

foreach (var node in UmbracoContext.Current.ContentCache.GetById(parentID).Descendants().Where(n => n.IsVisible() && filter.Contains(n.DocumentTypeAlias)))
{
    //do stuff to build & return list
}

It works fine for Published content, but now I need to also find Unpublished content... and I'm at a loss at the moment.

What should I be doing to also include unpublished nodes in my list?