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flutter_spinkit package
documentation
flutter_spinkit.dart
SpinKitFadingFour
controller property
controller property
dark_mode
light_mode
controller
property
AnimationController
?
controller
final
Implementation
final AnimationController? controller;
flutter_spinkit package
documentation
flutter_spinkit
SpinKitFadingFour
controller property
SpinKitFadingFour class