code: func (c *BigCache) Get(key string) ([]byte, error) {
  	hashedKey := c.hash.Sum64(key)
  	shard := c.getShard(hashedKey)
  	return shard.get(key, hashedKey)
  }
docs: // Get reads entry for the key.
  // It returns an ErrEntryNotFound when
  // no entry exists for the given key.