@Override
  public DiskStore findDiskStore(String name) {
    if (name == null) {
      name = GemFireCacheImpl.getDefaultDiskStoreName();
    }
    return diskStores.get(name);
  }
@return Context jndi context associated with the Cache.
geode-core/src/main/java/org/apache/geode/internal/cache/xmlcache/CacheCreation.java