Shadow constructor
      
      Shadow({ 
    
    
- String? alignment,
- double? alpha,
- Dimension? blurRadius,
- OpaqueColor? color,
- String? propertyState,
- bool? rotateWithShape,
- AffineTransform? transform,
- String? type,
Implementation
Shadow({
  this.alignment,
  this.alpha,
  this.blurRadius,
  this.color,
  this.propertyState,
  this.rotateWithShape,
  this.transform,
  this.type,
});