focusColor property Null safety
The color that should be used for the reaction when isFocused is true.
Used when the toggleable needs to change the reaction color/transparency, when it has focus.
Implementation
Color get focusColor => _focusColor!;
Implementation
set focusColor(Color value) {
if (value == _focusColor) {
return;
}
_focusColor = value;
notifyListeners();
}