driver-legacy/src/main/com/mongodb/BulkWriteRequestBuilder.java
public void update(final DBObject update) {
        new BulkUpdateRequestBuilder(bulkWriteOperation, query, false, codec, replacementCodec, collation, null).update(update);
    }
public void update(final DBObject update) {
        new BulkUpdateRequestBuilder(bulkWriteOperation, query, false, codec, replacementCodec, collation, null).update(update);
    }
Adds a request to update all documents in the collection that match the query with which this builder was created.

@param update the update criteria