code: public Integer delete(CMAWebhook webhook) {
      final String webhookId = getResourceIdOrThrow(webhook, "webhook");
      final String spaceId = getSpaceIdOrThrow(webhook, "webhook");
  
      return service.delete(spaceId, webhookId).blockingFirst().code();
    }
docs: Delete a given Webhook.
  
  @param webhook actual webhook to be deleted.
  @return the response code of the request (aka 200 if successful)
  @throws IllegalArgumentException if spaceId is null.
  @throws IllegalArgumentException if webhookId is null.