code: func (i *INA3221Driver) GetShuntVoltage(channel INA3221Channel) (float64, error) {
  	value, err := i.getShuntVoltageRaw(channel)
  	if err != nil {
  		return 0, err
  	}
  
  	return float64(value) * float64(.005), nil
  }
docs: // GetShuntVoltage Gets the shunt voltage in mV