toggle method
void
toggle()
Toggles the expansion tile between collapsed and expanded.
Implementation
void toggle() {
setState(() {
_isExpanded = !_isExpanded;
if (_isExpanded) {
_controller.forward();
widget.onExpanded?.call();
} else {
unawaited(collapse());
}
PageStorage.of(context).writeState(context, _isExpanded);
});
}