driver-core/src/main/com/mongodb/bulk/BulkWriteResult.java
public static BulkWriteResult acknowledged(final WriteRequest.Type type, final int count, final List<BulkWriteUpsert> upserts) {
        return acknowledged(type, count, 0, upserts);
    }
public static BulkWriteResult acknowledged(final WriteRequest.Type type, final int count, final List<BulkWriteUpsert> upserts) {
        return acknowledged(type, count, 0, upserts);
    }
Create an acknowledged BulkWriteResult

@param type    the type of the write
@param count   the number of documents matched
@param upserts the list of upserts
@return an acknowledged BulkWriteResult