@Override
  public void memberOfflineAndEqual(PersistentMemberID persistentID) {
    ds.memberOfflineAndEqual(this, persistentID);
    if (logger.isTraceEnabled(LogMarker.PERSIST_VERBOSE)) {
      logger.trace(LogMarker.PERSIST_VERBOSE,
          "PersistentView {} - {} - member offline and equal {}", getDiskStoreID().abbrev(),
          getName(), persistentID);
    }
  }
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