public static void Roll(IStackList <object> stack)
{
if (stack.HasA <int>())
{
var i = stack.Pop <int>();
if (i <= stack.Count)
{
for (var j = 0; j < i; j++)
{
var obj = stack.Pop();
stack.Add(obj);
}
}
else
{
stack.Push(i);
}
}
}