/// <summary>
        /// Prepare the event and add it to the BulkDescriptor.
        /// </summary>
        /// <param name="logEvent"></param>
        private void PrepareAndAddToBulk(Dictionary <string, object> logEvent)
        {
            ElasticFilters.PrepareEvent(logEvent);

            var indexName = _indexName.Format(logEvent).ToLower();
            var indexType = _indexType.Format(logEvent);

            var operation = new InnerBulkOperation
            {
                Document  = logEvent,
                IndexName = indexName,
                IndexType = indexType
            };

            lock (_bulk)
            {
                _bulk.Add(operation);
            }
        }
        /// <summary>
        /// Prepare the event and add it to the BulkDescriptor.
        /// </summary>
        /// <param name="logEvent"></param>
        private void PrepareAndAddToBulk(Dictionary<string, object> logEvent)
        {
            ElasticFilters.PrepareEvent(logEvent);

            var indexName = _indexName.Format(logEvent).ToLower();
            var indexType = _indexType.Format(logEvent);

            var operation = new InnerBulkOperation
            {
                Document = logEvent,
                IndexName = indexName,
                IndexType = indexType
            };

            lock (_bulk)
            {
                _bulk.Add(operation);
            }
        }