deleteItem method
Implementation
@override
PostModel deleteItem(PostModel model, MemberMediumContainerModel deleteItem) {
var newItems = <MemberMediumContainerModel>[];
for (var item in model.memberMedia!) {
if (item != deleteItem) {
newItems.add(item);
}
}
var newModel = model.copyWith(memberMedia: newItems);
return newModel;
}