private void print(final Step step) {
    final long now = System.currentTimeMillis();
    if (now - lastNotifyTimestamp >= PRINT_DELAY) {
      lastNotifyTimestamp = now;
      int peerCount = -1; // ethContext is not available in tests
      if (ethContext != null && ethContext.getEthPeers().peerCount() >= 0) {
        peerCount = ethContext.getEthPeers().peerCount();
      }
      switch (step) {
        case DOWNLOAD -> {
          LOG.debug(
              "Worldstate {} in progress accounts={}, slots={}, codes={}, nodes={}",
              step.message,
              nbAccountsDownloaded,
              nbSlotsDownloaded,
              nbCodes,
              nbTrieNodesGenerated);
          LOG.info(
              "Worldstate {} progress: {}%, Peer count: {}",
              step.message, percentageProgress.get().setScale(2, RoundingMode.HALF_UP), peerCount);
        }
        case HEAL_FLAT -> {
          LOG.debug(
              "Worldstate {} in progress accounts={}, slots={}",
              step.message,
              nbFlatAccountsHealed,
              nbFlatSlotsHealed);
          LOG.info(
              "Worldstate {} progress: {}%, Peer count: {}",
              step.message, percentageProgress.get().setScale(2, RoundingMode.HALF_UP), peerCount);
        }
        case HEAL_TRIE -> {
          LOG.info(
              "Healed {} world state trie nodes, Peer count: {}",
              nbTrieNodesHealed.get(),
              peerCount);
        }
      }
    }
  }
Represents the number of trie nodes healed during the healing process.
ethereum/eth/src/main/java/org/hyperledger/besu/ethereum/eth/sync/snapsync/SnapSyncMetricsManager.java