Is it possible to know when an annotation has been removed?

[rms2219]

I'm wondering to what extent we can know whether an annotation has been deleted from a document? This is of particular interest for me when dealing with documents that I load that already have annotations (i.e. not those that I add while using the viewer).

My original thought was to tap into the annotationEditorEvent, yet what I'm seeing is that that event is triggered for every existing annotation when I enable the highlighter ("added" events) and then when I disable the highlighter ("removed" events). The events will also fire when I add and then remove an individual annotation.

Along with this, I'm trying to understand why, when I "remove" an annotation, it is not removed from the underlying PDF document. That is, await page.getAnnotations() will include the annotation that I just removed.

Ultimately, I'm looking for a way to track annotations that exist in the document when it's loaded and keep track of everything individually that's been added or removed. This allows me to provide a sort of "syncing" feature on the backend by only providing the "current" annotation set. Is this possible today?