setters method
Implementation
@override
Map<String, Function> setters() => {
'backgroundColor': (value) => backgroundColor = Utils.getColor(value),
'borderColor': (value) => borderColor = Utils.getColor(value),
'borderWidth': (value) => borderWidth = Utils.optionalDouble(value),
'borderRadius': (value) => borderRadius = Utils.optionalDouble(value),
'horizontalPadding': (value) => horizontalPadding = Utils.optionalDouble(value),
'verticalPadding': (value) => verticalPadding = Utils.optionalDouble(value),
};