Add-in API to get a tree structure in a string list

Question

Hi, 
 Writing a C++ custom add-in using the Passolo add-in SDK, I am wondering how is it possible to realize a folder view in the string list tree. A good example to what I seek would be to look at the Passolo JSON add-in implementation in the attached picture. 
 What would be the API to get such a tree structure? Any input would be appreciated. 
 
 Yaron

Achim Herrmann · Answer

There is no special API call to create nested resources in a tree view. Instead of adding single resource names you have to concatenate all the previous resource names with a backslash like 
Json.Root\schema 
Json.Root\schema\allOf 
…

Passolo > 1. General

Add-in API to get a tree structure in a string list