How can I add shadow to an icon in flutter?

I got what i wanted eventually using this workaround. I hope it helps whoever might need something similar.

Stack(
  children: <Widget>[
    Positioned(
      left: 1.0,
      top: 2.0,
      child: Icon(icon, color: Colors.black54),
    ),
    Icon(icon, color: Colors.white),
  ],
),