ShaderMaskModifier constructor
      const
      ShaderMaskModifier({ 
    
- Key? key,
- Widget? child,
- Key? modifierKey,
- required ShaderCallback shaderCallback,
- BlendMode blendMode = BlendMode.modulate,
Creates a widget that applies a mask generated by a Shader to its child.
The shaderCallback and blendMode arguments must not be null.
Implementation
const ShaderMaskModifier({
  super.key,
  super.child,
  super.modifierKey,
  required this.shaderCallback,
  this.blendMode = BlendMode.modulate,
});