internal override void UpdateEdgeData(DirectedAdjListGraphVertex <T> vertex1, DirectedAdjListGraphVertex <T> vertex2, Func <EdgeData, EdgeData> updateFunc)
{
ListNode node = FindEdgeNode(vertex1, vertex2);
node.EdgeData = updateFunc(node.EdgeData);
}
internal override void CreateEdge(DirectedAdjListGraphVertex <T> vertex1, DirectedAdjListGraphVertex <T> vertex2, double weight)
{
InsertListNode(List[vertex1.Handle], new ListNode(vertex2), weight);
}
