updateScrollController method
Implementation
void updateScrollController(int i) {
if (_changing || !(picker.adapter.isLinkage)) return;
_changing = true;
for (int j = 0; j < picker.selecteds.length; j++) {
if (j != i) {
if (scrollController[j].hasClients &&
scrollController[j].position.hasContentDimensions)
scrollController[j].position.notifyListeners();
}
}
_changing = false;
}