Hi.
Is DOM capable of managing two subclasses at once, both extending the same DataObject that is passed to DOM as a $sourceClass param?
For example, I have a DataObject called Box with two subclasses: SwfBox and ImageBox.
I would like to use DOM to add Boxes of both types, one containing SWF files and another one with images, to the same DataObjectSet.
So what I need to have are two separate 'Add new' buttons, each for one subclass, and of course support for two different getCMSFields_forPopup() functions.
Is there any way to achieve this in DOM?

Errr... I tried to find any docs about that and failed.
I have a DOM field constructed like this:

$manager = new DataObjectManager(
$this,
'BoxManager',
'Box',
array(
"Title" => "Title",
),
'getCMSFields_forPopup'
);
$fields->addFieldToTab('Root.Content.BoxManager', $manager);

and two subclasses of the class 'Box': SwfBox and ImageBox.

What do I need to change if I want to add SwfBoxes and ImageBoxes in the same instance of DOM?

I searching solution for this too. Maybe who have ideas how make this work easly?