flutter_fader library Null safety

Classes

Fader
Widget that utilizes both AnimatedOpacity and Visibility to allow a widget to fade out, and then be hidden (so that it can't be interacted with)
FaderController
Controller for the fader. Allows the user to fade the widget in and out. [...]

Enums

FadeState
Used by the FaderController to tell its Faders that they should either fading in or fading out.