Flutter Gradient Button

import 'package:flutter/material.dart';

class GradientButton extends StatelessWidget {
  final String label;
  final double fontSize;
  final Color backgroundColor;
  final LinearGradient gradient;
  final Color textColor;
  final Color borderColor;
  final double width;
  final double height;
  final IconData icon;
  final Function onTap;
  final double borderRadius;

  const GradientButton({
    Key key,
    this.label = "GraientButton",
    this.fontSize,
    this.backgroundColor,
    this.gradient,
    this.textColor = Colors.white,
    this.borderColor,
    this.width,
    this.height = 50,
    this.icon,
    @required this.onTap,
    this.borderRadius = 40,
  }) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return ClipRRect(
      borderRadius: BorderRadius.circular(borderRadius),
      child: Material(
        color: backgroundColor ?? Theme.of(context).accentColor,
        child: InkWell(
          onTap: onTap,
          child: Ink(
            decoration: BoxDecoration(
              borderRadius: BorderRadius.all(Radius.circular(borderRadius)),
              gradient: gradient,
              border:
                  borderColor == null ? null : Border.all(color: borderColor),
            ),
            child: Container(
              width: width,
              height: height,
              alignment: Alignment.center,
              child: label == ''
                  ? icon == null ? Container() : Icon(icon, color: textColor)
                  : Row(
                      mainAxisAlignment: MainAxisAlignment.center,
                      children: <Widget>[
                        icon == null
                            ? Container()
                            : Icon(icon, color: textColor),
                        Container(width: icon == null ? 0 : 7),
                        Text(
                          label,
                          style: TextStyle(
                            color: textColor,
                            fontWeight: FontWeight.bold,
                            fontSize: fontSize,
                          ),
                        ),
                      ],
                    ),
            ),
          ),
        ),
      ),
    );
  }
}