/// <summary>
/// Removes the edge from->unknown and replaces it with the edge from->to->unknown.
/// 0->1:InsertAfter(0, 2):0->2-1
/// </summary>
/// <param name="from"></param>
/// <param name="to"></param>
public void InsertAfter(int from, int to)
{
if (from == 0)
{
_route.InsertFirst(to);
}
else
{
_route.InsertAfter(from, to);
}
}