code: func (c *Client) Get(vb uint16, key string) (*gomemcached.MCResponse, error) {
  	return c.Send(&gomemcached.MCRequest{
  		Opcode:  gomemcached.GET,
  		VBucket: vb,
  		Key:     []byte(key),
  	})
  }
docs: // Get the value for a key.