private List <ImpressionCount> GetImpressionsCountsSentBackend(HttpClientMock httpClientMock = null)
        {
            var impressions = new List <ImpressionCount>();
            var logs        = httpClientMock.GetImpressionCountsLogs();

            foreach (var log in logs)
            {
                var _impression = JsonConvert.DeserializeObject <ImpressionCount>(log.RequestMessage.Body);

                impressions.Add(_impression);
            }

            return(impressions);
        }