@Override
  public String print() {
    if (loaded == null) {
      return "StoredNode:" + "\n\tRef: " + getEncodedBytesRef();
    } else {
      return load().print();
    }
  }
Marks the node as being modified (needs to be persisted);
ethereum/trie/src/main/java/org/hyperledger/besu/ethereum/trie/StoredNode.java