DeleteByQueryResponse vs DeleteResponse

Question

I have the following code:

ElasticService.delete(id) match {
case failure: RequestFailure => complete(StatusCodes.InternalServerError, failure.body.getOrElse("Unknown reason"))

case success: RequestSuccess[DeleteResponse] => {
  println(s"$id Deleted")
  .....
}

}

'delete' method is implemented as:

def delete(id: String): Response[DeleteResponse] = {
    client.execute {
      deleteById("myIndex", id)
    }.await
  }

This all works as expected. But if I modify match block by replacing DeleteResponse with DeleteByQueryResponse, I see that match still happens.

Why is it so? I see no hierarchical relationship between DeleteResponse and DeleteByQueryResponse.