text: background_app_bar 2.0.0
  background_app_bar: ^2.0.0 copied to clipboard
  A background app bar plugin, use this plugin if you want to preserve background of sliver app bar when scrolling,
  Use this package as a library
  Depend on it
  Run this command:
  With Flutter:
  $ flutter pub pub add background_app_bar
  This will add a line like this to your package's pubspec.yaml (and run an implicit
  dart pub get):
  dependencies: background_app_bar: ^2.0.0
  Alternatively, your editor might support
  flutter pub get.
  Check the docs for your editor to learn more.
  Import it
  Now in your Dart code, you can use:
  import 'package:background_app_bar/background_app_bar.dart';