Dynamic ARTrackedImageManager not passing through ID

After adding some 2D Texture image targets dynamically:

Code (CSharp):

1. MutableRuntimeReferenceImageLibrary runtimeLibrary = (MutableRuntimeReferenceImageLibrary)trackedImageManager.referenceLibrary;
2. Assert.IsNotNull(runtimeLibrary);
3. Assert.IsTrue(runtimeLibrary.IsTextureFormatSupported(texture.format));
4. runtimeLibrary.ScheduleAddImageJob(texture, "testID1", 1f);

It does find the target and I get a callback from trackedImagesChanged, though within that callback I can't identify it (to have different effects for different images). I could use the "testID1" I passed above, but it doesn't seem to come through anywhere.

I tried looking at

Code (CSharp):

1. void OnCameraTrackedImagesChanged(ARTrackedImagesChangedEventArgs eventArgs)
2.     {
3.         foreach (ARTrackedImage tracked in eventArgs.added)
4.         {
5.             Debug.Log(tracked.trackableId); // => 5E969451F6027D59-4653242E909B38B3
6.             Debug.Log(tracked.name); // => ARTrackedImage
7.             Debug.Log(tracked.referenceImage.name); // => 5E969451F6027D59-4653242E909B38B3
8.         }
9.     }
10.  

Interestingly also, tracked.referenceImage.texture == null, even though tracked.pending == false. Otherwise I might be able to compare the textures.

Is there a best practice for this?

 

I've been identifying image trackers using trackedImage.referenceImage.name

That said, I don't recall where exactly that value comes from. I think that's where "testID1" goes? It's either that or the name of the texture added.