startAtDocument method
Creates and returns a new Query
that starts at the provided document
(inclusive). The starting position is relative to the order of the query.
The document must contain all of the fields provided in the orderBy of
this query.
Calling this method will replace any existing cursor "start" query modifiers.
Implementation
@override
Query<Map<String, dynamic>> startAtDocument(
DocumentSnapshot<Object?> documentSnapshot,
) {
// TODO: implement startAtDocument
throw UnimplementedError();
}