Products OR-Tools Reference C++ Reference: util This documentation is automatically generated. A collections of utilities for the Graph classes in ./graph.h. Classes UndirectedAdjacencyListsOfDirectedGraph Except as otherwise noted, the content of this page is licensed under the Creative Commons Attribution 4.0 License, and code samples are licensed under the Apache 2.0 License. For details, see our Site Policies. Java is a registered trademark of Oracle and/or its affiliates. Last updated July 29, 2018.