code: func (ls *LocalStore) Get(ctx context.Context, addr Address) (chunk Chunk, err error) {
  	ls.mu.Lock()
  	defer ls.mu.Unlock()
  
  	return ls.get(ctx, addr)
  }
docs: // Get(chunk *Chunk) looks up a chunk in the local stores
  // This method is blocking until the chunk is retrieved
  // so additional timeout may be needed to wrap this call if
  // ChunkStores are remote and can have long latency