public bool TryGetNodeIndex([NotNull] IPoint point, out int index)
        {
            if (AreaOfInterest != null &&
                GeometryUtils.Disjoint(AreaOfInterest, point))
            {
                index = -1;
                return(false);
            }

            Node node = CreateNode(point);

            return(NodeIndexesByNode.TryGetValue(node, out index));
        }
        public void RemoveNodeAt([NotNull] IPoint point)
        {
            Node node = CreateNode(point);

            int nodeIndex;

            if (!NodeIndexesByNode.TryGetValue(node, out nodeIndex))
            {
                return;
            }

            // instead of removing the node (and updating all the lists), make it a dead-end -> set node to null as well?
            Nodes[nodeIndex] = null;
            Connections[nodeIndex].Clear();

            // Check if it is an interior node, remove from the interior list, if it is in the list
            foreach (List <int> interiorNodes in EdgeInteriorNodesByEdge.Values)
            {
                interiorNodes.Remove(nodeIndex);
            }

            NodeIndexesByNode.Remove(node);
        }