please add support in prompt bean feature for this following scenario.

Lets say I need to show two selection boxes for my configuration, selection A and selection B.
1) I want populate selection A with list of drives in my system ( here the list is dynamic)
2) selection B should updated with all the directories of the selected drive in selection A.

using polymorphic editor approach requires implementing a separate class for each of the items in selection A, which is a dynamic list, so I can't do this.