Return a map of IDs (i.e.
_idfield values) for documents that were inserted by all insert operations in the bulk write.
function getInsertedIds(): array
Since IDs are created by the driver, this method may be called irrespective of whether the write was acknowledged.
A map of IDs (i.e.
_id field values) for documents that were inserted by all
insert operations in the bulk write.
The index of each ID in the map corresponds to each document's position in the
bulk operation. If a document had an ID prior to inserting (i.e. the driver did
not generate an ID), the index will contain its
_id field value. Any
driver-generated ID will be a MongoDB\\BSON\\ObjectId instance.