deleteAll method
Delete multiple items from Dashboard.
Implementation
void deleteAll(List<String> ids) {
if (_isAttached) {
itemStorageDelegate?._onItemsDeleted(
ids.map((e) => _getItemWithLayout(e)).toList(),
_layoutController!.slotCount);
_layoutController!.deleteAll(ids);
_items.removeWhere((k, v) => ids.contains(k));
} else {
throw Exception("Not Attached");
}
}