@Override
        public AbstractIterator<? extends RecordBatch> batchIterator() {
            return elasticLogFileRecords.batchIterator(startOffset, maxOffset, fetchSize);
        }
Return the largest timestamp of the messages after a given offset

@param startOffset The starting offset.
@return The largest timestamp of the messages after the given position.
core/src/main/scala/kafka/log/streamaspect/ElasticLogFileRecords.java