NSMutableArray Move

- (void)moveObjectFromIndex:(NSUInteger)from toIndex:(NSUInteger)to
{
    if (to != from) {
        id obj = [addItemsList objectAtIndex:from];
        [obj retain];
        [addItemsList removeObjectAtIndex:from];
        if (to >= [addItemsList count]) {
            [addItemsList addObject:obj];
        } else {
            [addItemsList insertObject:obj atIndex:to];
        }
        [obj release];
    }
}