如何在Dart中复制矩形

class Rectangle {
  double width;
  double height;

  Rectangle(this.width, this.height);

  Rectangle copy() {
    return Rectangle(width, height);
  }
}

void main() {
  Rectangle original = Rectangle(10, 5);
  Rectangle copy = original.copy();

  print('Original Rectangle: ${original.width} x ${original.height}');
  print('Copied Rectangle: ${copy.width} x ${copy.height}');
}