code: func (c *ShardedClient) Increment(
  	key string,
  	delta uint64,
  	initValue uint64,
  	expiration uint32) CountResponse {
  
  	return c.count(
  		key,
  		func(shardClient Client) CountResponse {
  			return shardClient.Increment(key, delta, initValue, expiration)
  		})
  }
docs: // See Client interface for documentation.