For example: content://com.ichi2.anki.flashcards/notes?deckId=1234567890123
AddContentApi supports this with a new addNotes() method. The Api does the duplicate checking to make sure no duplicates are passed to bulkInsert().
These implementations check whether the provider supports these new features using a spec version code defined as a meta-data key of the provider in the manifest.
The new bulkInsert support for notes is 2000% faster (based on inserting 2100+ notes) than inserting notes one-by-one (as in the old way).