code: public CMAWebhookCallDetail callDetails(CMAWebhookCall call) {
      final String spaceId = getSpaceIdOrThrow(call, "call");
      final String callId = getResourceIdOrThrow(call, "call");
      assertNotNull(call.getSystem().getCreatedBy().getId(), "webhook.sys.createdBy");
      final String webhookId = call.getSystem().getCreatedBy().getId();
  
      return service.callDetails(spaceId, webhookId, callId).blockingFirst();
    }
docs: Get more information about one specific call to one specific webhook, hosted by one specific
  space.
  
  @param call A call to be get more information about.
  @return A Call Detail to be used to gather more information about this call.
  @throws IllegalArgumentException if spaceId is null.
  @throws IllegalArgumentException if webhook is null.
  @throws IllegalArgumentException if callId is null.