set the menu item dynamiclly inside the nested multparm?

[tatsu6086]

hi everyone ,
im trying to create a dynamic multiparm in my hda.
i know how to access multiparm block's parameter and set the menu item from attribute.
but i cant find a way to set the menu item dynamiclly inside the nested multparm.
please help.
is there any way i can do this ?

for example ,the grey box only has 3 sizes, but it listed up other box's size.

here its how i make the menu item. 

im not sure i explained well enough.
but please take a look into my files.

Thanks.

 

 

test_dynamic_ui.hdanc

test_hda.hipnc

Edited November 30, 2021 by tatsu6086