hasUnsavedChanges abstract method

Future<bool> hasUnsavedChanges()

Whether the document has unsaved changes that save would persist.

Platform semantics differ in what the underlying SDK can report:

Platform	Backed by	Covers
Android	annotation ∥ form ∥ bookmark provider hasUnsavedChanges()	annotations, forms, bookmarks
iOS	Document.hasDirtyAnnotations	annotations (form and bookmark changes may not be reflected)
Web	Instance.hasUnsavedChanges()	annotations, forms, bookmarks, comments

For exact dirty tracking on iOS — or to react to changes as they happen — combine this with event-based tracking on controller.events (see the manual-save catalog example and the dirty-state tracking guide).

Implementation

Future<bool> hasUnsavedChanges();