code: public ImmutableSortedSet<Name> snapshotWorkingDirectoryEntries() {
      store.readLock().lock();
      try {
        ImmutableSortedSet<Name> names = workingDirectory.snapshot();
        workingDirectory.updateAccessTime();
        return names;
      } finally {
        store.readLock().unlock();
      }
    }
docs: Snapshots the entries of the working directory of this view.