How to work with models and complex data structures

[JoeJoeTV]

I am working on a project, where I have some data in a bit more complex data structure consisting of a hashmap and possibly nested hash maps. Sort of like a very shallow tree structure.

Now, I want to display that data in the UI. Currently, I have a function that flattens the data structure to an array, which is then used by the UI to display the data in a custom table-like view.
Interactive elements in the view are stored separately as changing the vector model does not update the original structure of course.

I looked at implementing the Model trait for the data structure, but as the models in slint work with indicies, I think I would need some overhead to be able to notify when e.g. single rows change.

Is there a better solution for this?

EDIT: I've also though about having a callback to access items in the hash map and then just iterating over the amount of items in slint, but I think the problem there is, that changing the contents of the data structure will not necessarily update the UI.