@Override
  public void setInitialized() {
    ds.setInitialized(this);
    if (logger.isTraceEnabled(LogMarker.PERSIST_VERBOSE)) {
      logger.trace(LogMarker.PERSIST_VERBOSE, "PersistentView {} - {} - initialized local id: {}",
          getDiskStoreID().abbrev(), getName(), getMyPersistentID());
    }
  }
Used to initialize a PlaceHolderDiskRegion for a region that is being closed

@param drv the region that is being closed
geode-core/src/main/java/org/apache/geode/internal/cache/AbstractDiskRegion.java