public static void WriteToFile(string path, OperationGraph graph)
 {
     GraphSerializer.WriteToFile <OperationGraph, OperationNode>(
         path,
         graph,
         (h, g) => { },
         WriteNode);
 }
        public static void WriteToGraphvizFile(string path, OperationGraph graph)
        {
            var builder = new StringBuilder();

            GraphSerializer.WriteToGraphvizFile(
                path,
                graph,
                n => GetNodeLabel(builder, n));
        }