@VisibleForTesting
  boolean doUnlockDiskStore(String diskStoreName) {
    CountDownLatch countDownLatch = diskStoreLatches.get(diskStoreName);
    if (countDownLatch != null) {
      countDownLatch.countDown();
      return true;
    }
    return false;
  }
Decrements the count of the {@code CountDownLatch} associated with the disk store.

@param diskStoreName the name of the disk store
@return {@code true} if the disk store associated {@code CountDownLatch} has decremented;
        {@code false} otherwise.
geode-core/src/main/java/org/apache/geode/internal/cache/GemFireCacheImpl.java