private void init() {
    if (!isEmpty()) {
      LOGGER.warn(
          "SubscriptionEventTabletResponse {} is not empty when initializing (broken invariant)",
          this);
      return;
    }

    offer(generateEmptyTabletResponse());
  }
The {@code SubscriptionEventTabletResponse} class extends {@link
SubscriptionEventExtendableResponse} to handle subscription responses specifically for tablet
data. The actual payload of the response includes a {@link TabletsPayload}, which contains the
tablet information being processed.
iotdb-core/datanode/src/main/java/org/apache/iotdb/db/subscription/event/response/SubscriptionEventTabletResponse.java