NavigationButton constructor
      const
      NavigationButton({ 
    
    
- Key? key,
- VoidCallback? onPressed,
- Widget? label,
- double? spacing,
- AbstractButtonStyle? style,
- AlignmentGeometry? alignment,
- bool? enabled,
- NavigationOverflow overflow = NavigationOverflow.marquee,
- AlignmentGeometry? marginAlignment,
- required Widget child,
Implementation
const NavigationButton({
  super.key,
  this.onPressed,
  super.label,
  super.spacing,
  super.style,
  super.alignment,
  super.enabled,
  super.overflow,
  super.marginAlignment,
  required super.child,
});