updateSelectItem method
Implementation
void updateSelectItem(ItemSelect item, bool newValue) {
if (newValue) {
selectedList.add(item);
} else {
selectedList.removeWhere((element) => element.id == item.id);
}
list.forEach((element) {
if (element.id == item.id) {
element.isSelected = newValue;
}
});
showList.forEach((element) {
if (element.id == item.id) {
element.isSelected = newValue;
}
});
}