/// <summary>
/// Removes all constraints introduced at or after index.
/// </summary>
/// <param name="index"></param>
public void ContractSideConstraint(int index)
{
var deleteList = new LinkedList <int>();
foreach (var kv in SideConstraints.GetEnumerable(index))
{
deleteList.AddLast(kv.Key);
}
foreach (var k in deleteList)
{
SideConstraints.Remove(k);
}
}
