DefaultAnimatedAction class

Animated widget that animates transition for adding, removing, moving stacked widget. Usually it is used in widgetChangeBuilder.

Example:

AnimatedWidgetStack(
  positions: positions,
  stackedWidgets: stackedWidgets,
  widgetChangeBuilder: (context, action, constraints) {
    return WidgetWithParameters(
      widget: DefaultAnimatedAction(
        key: action.key,
        action: action,
        size: constraints.biggest,
        infoWidgetBuilder: _infoItemBuilder,
      ),
    );
  },
);