Custom button Flutter

Generic button with icon and text

class CustomButton extends StatelessWidget {
  final String textButton;
  final Icon iconButton;
  final String navigator;

  const CustomButton(
      {Key? key,
      required this.textButton,
      required this.iconButton,
      required this.navigator})
      : super(key: key);

  @override
  Widget build(BuildContext context) {
    Size size = MediaQuery.of(context).size;
    TextStyle styleText = const TextStyle(
        color: Color(0XFFFFFFFF),
        fontSize: 22,
        fontWeight: FontWeight.w500,
        letterSpacing: 1.6);
    BoxDecoration containerDecoration =
        const BoxDecoration(color: Color(0xFF212121), boxShadow: [
      BoxShadow(color: Colors.grey, offset: Offset(0.0, 15.0), blurRadius: 20.0)
    ]);

    return MaterialButton(
      onPressed: () {
        Navigator.pushNamed(context, navigator);
      },
      child: Container(
        height: size.height * 0.07,
        width: size.width * 0.4,
        decoration: containerDecoration,
        child: Center(
          child: Row(
            children: [
              SizedBox(
                width: size.width * 0.03,
              ),
              iconButton,
              SizedBox(
                width: size.width * 0.03,
              ),
              FittedBox(
                fit: BoxFit.contain,
                child: Text(
                  textButton,
                  style: styleText,
                ),
              ),
            ],
          ),
        ),
      ),
    );
  }
}