@Override
  public void rename(String source, String dest) throws IOException {
    ensureOpen();
    fs.renameFile(source, dest);
  }
Create a region directory with a given file and chunk region. These regions may be bucket
regions or they may be replicated regions.
geode-lucene/src/main/java/org/apache/geode/cache/lucene/internal/directory/RegionDirectory.java