public static void PushBefore(DoubleLinkNode2 <T> after, DoubleLink2 <T> list)
{
if (after.IsAttach() && !list.IsEmpty())
{
DoubleLink2 <T> ._PushBefore(after, list);
}
}
public static void PushAfter(DoubleLinkNode2 <T> before, DoubleLink2 <T> list)
{
if (before.IsAttach() && !list.IsEmpty())
{
DoubleLink2 <T> ._PushAfter(before, list);
}
}