How can I use a WPILIB java method to display the supply voltage of the XRP to the dashboard?

General
1

I’ve tried the Standard WPILIB method as follows but it displays 12v which is impossible (I thnk):

   // Get the current battery voltage

    double batteryVoltage = RobotController.getBatteryVoltage();

    // Display the voltage on the SmartDashboard with the key "Battery Voltage"

     SmartDashboard.putNumber("Battery Voltage", batteryVoltage);
2

@ZeeQueue Does the WPILIB version support the battery voltage?