dispose method
Free up the resources associated with this ink feature.
Implementation
@mustCallSuper
void dispose() {
assert(!_debugDisposed);
assert(() {
_debugDisposed = true;
return true;
}());
// TODO(polina-c): stop duplicating code across disposables
// https://github.com/flutter/flutter/issues/137435
if (kFlutterMemoryAllocationsEnabled) {
FlutterMemoryAllocations.instance.dispatchObjectDisposed(object: this);
}
_controller._removeFeature(this);
onRemoved?.call();
}