code: public static BulkWriteResult acknowledged(final WriteRequest.Type type, final int count, final List<BulkWriteUpsert> upserts) {
          return acknowledged(type, count, 0, upserts);
      }
docs: 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