To toggle the display of construction lines

debugPaintSizeEnabled

To simulate different operating systems

defaultTargetPlatform

To display the performance overlay

WidgetsApp. showPerformanceOverlay

To save a screenshot to flutter. png

To quit

Animation

Well-designed animation makes a UI feel intuitive,
contributes to the look and feel of a polished app,
and improves the user experience.
Flutter’s animation support makes it easy
to implement simple and complex animations.
The Flutter SDK includes many Material Design widgets
that include standard motion effects,
and you can easily customize these effects
to personalize your app.

In React Native, Animated APIs are used to create animations.