nextButtonText property
Text for the button that advances past this step.
May be a localization key or a literal — anything the localizations do not recognise is shown as-is.
When null the task-wide RPUITask.nextButtonText is used, which in turn
falls back to the localized 'NEXT' key. Set this for steps whose forward
action reads better as something specific, e.g. "Start Practicing".
Implementation
String? nextButtonText;