code: func (c *syncClient) Scard(arg0 string) (result int64, err Error) {
  	arg0bytes := []byte(arg0)
  
  	var resp Response
  	resp, err = c.conn.ServiceRequest(&SCARD, [][]byte{arg0bytes})
  	if err == nil {
  		result = resp.GetNumberValue()
  	}
  	return result, err
  
  }
docs: // Redis SCARD command.