/// <summary>
/// This constructor defaults to UnchosenVertexNodeState.
/// </summary>
/// <param name="node"></param>
protected internal VertexNodeStateContext(VertexNode node)
: base(node, UnchosenVertexNodeState.Instance)
{
}
protected internal VertexNodeStateContext(VertexNode node, VertexNodeState state)
: base(node, state)
{
}