Barrier constructor
const
Barrier({})
Implementation
const Barrier({
super.key,
required this.child,
required this.show,
this.switchDuration = const Duration(milliseconds: 300),
// this.timeout = const Duration(seconds: 30),
this.backgroundColor,
this.useBoxIndicator = false,
this.boxBackgroundColor,
this.boxWidget,
this.label,
});