public AverageData Calculate(string identifier)
        {
            var data = new AverageData();

            var lines = this.Blob.GetAllLines();
            foreach (var line in lines)
            {
                var lineCalculator = new LineAverageStockPrice(line);
                var lineAverage = lineCalculator.Calculate(identifier);
                data.Merge(lineAverage);
            }

            return data;
        }
        public AverageData Calculate(string identifier)
        {
            var data = new AverageData();

            var lines = this.Blob.GetAllLines();

            foreach (var line in lines)
            {
                var lineCalculator = new LineAverageStockPrice(line);
                var lineAverage    = lineCalculator.Calculate(identifier);
                data.Merge(lineAverage);
            }

            return(data);
        }