code: public CMAArray<CMAWebhookCall> calls(CMAWebhook webhook) {
      final String spaceId = getSpaceIdOrThrow(webhook, "webhook");
      final String webhookId = getResourceIdOrThrow(webhook, "webhook");
  
      return service.calls(spaceId, webhookId).blockingFirst();
    }
docs: Get more information about a specific webhook.
  
  @param webhook webhook to be asked for more detail.
  @return A detailed object for the given webhook.
  @throws IllegalArgumentException if spaceId is null.
  @throws IllegalArgumentException if webhook is null.
  @see CMAWebhookCall