@Override
  @SuppressFBWarnings(value = "IS2_INCONSISTENT_SYNC", justification = "Intended")
  public void list(PrintStream out) {
    if (interned != null) interned.list(out);
    else super.list(out);
  }
**********   Public API of java.util.Properties   ***********
common/src/java/org/apache/hadoop/hive/common/CopyOnFirstWriteProperties.java