Select Subassembly of a Region

Good afternoon
I am trying in Dynamo, to select a Subassembly from a specific Region… and I don’t see how to do it.
I see how to select all the subassemblies (with the same name) of a corridor, but not of a specific region…
Does anyone have any idea how to do it?

Hope this is what you are looking for, someone might have a better way to get this.

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Thank you, yes, the CorridorExtension.GetAssembly node was the one I was missing… But now I’m facing another little problem… How can I extract only the name of the Subassembly list that I have at the end of this code… Is there any node that does it?
Thanks for the support…
attached image

Check this nodes,

thanks!!! I try