LifeCycleManager constructor Null safety

const LifeCycleManager(
  1. {required dynamic onResume(
      ),
    1. required dynamic onPause(
        ),
      1. required dynamic child,
      2. dynamic onStart(
          )?,
        1. dynamic onVisible(
            )?,
          1. dynamic onInvisible(
              )?,
            1. dynamic key}
            )

            Implementation

            const LifeCycleManager({
  required this.onResume,
  required this.onPause,
  required this.child,
  this.onStart,
  this.onVisible,
  this.onInvisible,
  Key? key,
}) : super(key: key);