How to match comments on an image using kix anchor (or not) in Google Docs

Question

It\'s possible to retrieve elements of an open Google Docs document, starting from

DocumentApp.openById(doc_id, folder_id)

but the comments

Answer 1

Simple answer is you can't match reliably. The anchors simply aren't exposed in the Document API anywhere. If they were exposed, I'd expect them to appear as NamedRange or Bookmark entries, but neither appears populated by comment anchors.