update method
Updates fields in the document referred to by documentReference
.
The update will fail if applied to a document that does not exist.
Implementation
Transaction update(
DocumentReference documentReference, Map<String, dynamic> data) {
assert(documentReference.firestore == _firestore,
'the document provided is from a different Firestore instance');
return Transaction._(
_firestore,
_delegate.update(documentReference.path,
_CodecUtility.replaceValueWithDelegatesInMap(data)!));
}