UnselfNavigationBarBackButton constructor Null safety

const UnselfNavigationBarBackButton(
  1. {Key? key,
  2. Color? color,
  3. String? previousPageTitle,
  4. VoidCallback? onPressed}
)

Implementation

const UnselfNavigationBarBackButton({
  Key? key,
  this.color,
  this.previousPageTitle,
  this.onPressed,
})  : _backChevron = null,
      _backLabel = null,
      super(key: key);