private Session HandleOnGetSessionCalled(string source, string sessionName, uint start, int end)
        {
            // If the session is already playing return it
            if (_playbackService.ContainsSession(source, sessionName, start, end))
            {
                return(_playbackService.Session);
            }

            // otherwise load it from the query services
            var queryService = _queryServices.Where(qs => qs.GetStorageName() == source)
                               .Select(qs => qs)
                               .First();
            var session = queryService.GetSession(sessionName, start, end);

            return(session);
        }