SmoothProductCardNotFound constructor Null safety

const SmoothProductCardNotFound(
  1. {required String barcode,
  2. dynamic callback(
    1. String?
    )?,
  3. double elevation = 0.0}
)

Implementation

const SmoothProductCardNotFound({
  required this.barcode,
  this.callback,
  this.elevation = 0.0,
});