@Override
  public ProgressIndex getProgressIndex() {
    return event.getProgressIndex();
  }
{@link PipeRealtimeEvent} is an event that decorates the {@link EnrichedEvent} with the
information of {@link TsFileEpoch} and schema info. It only exists in the realtime event
extractor.
iotdb-core/datanode/src/main/java/org/apache/iotdb/db/pipe/event/realtime/PipeRealtimeEvent.java