disabledBorderColor property Null safety
final
The border color to display when the toggle button is disabled.
If this property is null, then ToggleButtonTheme.of(context).disabledBorderColor is used. If ToggleButtonsThemeData.disabledBorderColor is also null, then Theme.of(context).disabledBorderColor is used.
Implementation
final Color? disabledBorderColor;