NavigationItem constructor 
    
      const
      NavigationItem({ - Key? key, 
 
- required String imagePath, 
 
- required IconData icondata, 
 
- required String title, 
 
- required Color color, 
 
- VoidCallback? onPressed, 
 
- required Color containerColor, 
 
- required double topLeftCurve, 
 
- required double topRightCurve, 
 
- required double bottomLeftCurve, 
 
- required double bottomRightCurve, 
 
})
    
    
    
  Implementation
  const NavigationItem({
  super.key,
  required this.imagePath,
  required this.icondata,
  required this.title,
  required this.color,
  this.onPressed,
  required this.containerColor,
  required this.topLeftCurve,
  required this.topRightCurve,
  required this.bottomLeftCurve,
  required this.bottomRightCurve,
});