How to use .scrollToIndex with a prepending list?

[alii]

It's not trivial to find out the index of an item anymore because the index changes when new messages are loaded in etc. How can we calculate what the index should be when we start with something like 10000?

As an idea, would it be possible to have .scrollToIndex take a callback with each item in data? That way the index wouldn't need to be known but internally virtuoso could track it. Note that this would have performance implications.

// Example: scroll to message where id is `id`
virtuoso.current.scrollToIndex({
      index: m => m.id === id,
      align: 'center',
      behavior: 'auto',
});