protected void trackResource() {
    // do nothing by default
  }
{@link EnrichedEvent} is an {@link Event} that can be enriched with additional runtime
information. The additional information mainly includes the {@link EnrichedEvent#referenceCount}
of the {@link Event}.
iotdb-core/node-commons/src/main/java/org/apache/iotdb/commons/pipe/event/EnrichedEvent.java