32

+
                with SingleTickerProviderStateMixin {

33

+
              late AnimationController _controller;

34

32
35

@override

33
36

void initState() {

34
37

super.initState();

38

+
                _controller =

39

+
                    AnimationController(vsync: this, duration: const Duration(seconds: 1));

35
40

36
41

@override

37
42

void dispose() {

43

+
                _controller.dispose();