/// <summary>
///
/// </summary>
/// <param name="nodeFact"></param>
public NodeMap(NodeFactory nodeFact)
{
this.nodeFact = nodeFact;
}
/// <summary>
/// Creates a new instance of a Planar Graph
/// </summary>
/// <param name="nodeFact">A node Factory</param>
public PlanarGraph(NodeFactory nodeFact)
{
_nodes = new NodeMap(nodeFact);
}