Examples of Dart extension methods

extension_example.dart

extension Paddings on Widget {
  Widget paddingAll(double padding) => Padding(
        padding: EdgeInsets.all(padding),
        child: this,
      );
}

extension TextStyles on Text {
  Text h1() {
    if (this is Text) {
      final Text t = this;
      return Text(
        t.data,
        style: TextStyle(
          color: Colors.black,
          fontWeight: FontWeight.w600,
          fontSize: 50.0,
          fontFamily: merriweather,
        ),
      );
    }
    return null;
  }
}