How to add gradient on icons

I trying to achive this type of gradient on icons but unable to do that...

Output image

I already use this code for that but it also dosen't show any effect

ShaderMask(
  shaderCallback: (Rect bounds) => RadialGradient(
     center: Alignment.center,
     radius: 0.5,
     colors: [
       Colors.pink,
       Colors.deepOrange,
     ],
     tileMode: TileMode.mirror,
  ).createShader(bounds),
  child: Icon(Icons.access_time,),),

What should I do for achiving that?

It is missing blendMode: BlendMode.srcIn. Play with stops and colors

ShaderMask(
  blendMode: BlendMode.srcIn,
  shaderCallback: (Rect bounds) => RadialGradient(
    center: Alignment.topCenter,
    stops: [.5, 1],
    colors: [
      Colors.pink,
      Colors.yellow,
    ],
  ).createShader(bounds),
  child: Icon(
    Icons.access_time,
    size: 133,
  ),
),