Can't set a default checked Button

[jokerstudios]

Hey, thank you for your great library. I have a problem with the Radio Group. I cant see or use the checkedPosition or checkedButton method. They just dont show up?

private RadioRealButtonGroup radioRealButtonGroup radioRealButtonGroup = findViewById(R.id.real_readio_button_category);

And these to methods are just red and not found ( I know that checkedButton needs a reference, just for demo purpose no one included here) radioRealButtonGroup.checkedPosition(2); radioRealButtonGroup.checkedButton();

[AyoPrez]

radioRealButtonGroup.setPosition(n); make the trick