Menu recursive in app inventor

Hi to everyone,
someone know how to make a recursive menu with AI?
I need a two-levels menu (expand & collapse or other method) to set category BEFORE run query.
Any suggests?

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Thank you.

This menu can have arbitrary depth, with bread crumbs ...

Capture Capture2
Docs.csv (3.5 KB) DocumenterV4.aia (5.7 KB)

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