This is actually a really nice feature that they created. Can’t wait to put it to use somewhere. Good job Bubble!
Here is a very simple example:
Preview: https://805testapp42.bubbleapps.io/version-test/repeating_group_pages?debug_mode=true
Editor: https://bubble.io/page?type=page&name=repeating_group_pages&id=805testapp42&tab=tabs-1
Hope that helps! 
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