/**
     * the entry point we started building the graph from
     */
    MetadataGraphVertex entry;

    // graph vertices
    TreeSet<MetadataGraphVertex> vertices;

    /**
     * incident and excident edges per node
     */
    Map<MetadataGraphVertex, List<MetadataGraphEdge>> incidentEdges;

    Map<MetadataGraphVertex, List<MetadataGraphEdge>> excidentEdges;

    /**
     *  null in dirty graph, actual

/**
 * Abstract base class for an incident edges set that allows different implementations of {@link
 * AbstractSet#iterator()}.
 */
abstract class IncidentEdgeSet<N> extends AbstractSet<EndpointPair<N>> {
  final N node;
  final ArchetypeGraph<N> graph;
  final EdgeType edgeType;

  enum EdgeType {
    INCOMING, // incoming incident edges only
    OUTGOING, // outgoing incident edges only

              }
            };
        return nodeInvalidatableSet(incident, node);
      }

      @Override
      public Set<EndpointPair<N>> outEdges(N node) {
        checkNotNull(node);
        checkArgument(nodes().contains(node));
        IncidentEdgeSet<N> incident =
            new IncidentEdgeSet<N>(this, node, IncidentEdgeSet.EdgeType.OUTGOING) {
              @Override

3.612-1.538-1.55L0 4.26 2.974 7.25 8 2.193z'/%3E%3C/svg%3E")}.accent-primary .custom-control-input:focus:not(:checked)~.custom-control-label::before,.accent-primary .custom-file-input:focus~.custom-file-label,.accent-primary .custom-select:focus,.accent-primary .form-control:focus:not(.is-invalid):not(.is-warning):not(.is-valid){border-color:#80bdff}.accent-primary .page-item .page-link{color:#007bff}.accent-primary .page-item.active .page-link,.accent-primary .page-item.active a{background-color:#007bff;...

e-link):not(.badge):not(.btn),\n.accent-success .nav-tabs .nav-link {\n  color: #28a745;\n}\n\n.accent-success .btn-link:hover,\n.accent-success a:not(.dropdown-item):not(.btn-app):not(.nav-link):not(.brand-link):not(.page-link):not(.badge):not(.btn):hover,\n.accent-success .nav-tabs .nav-link:hover {\n  color: #19692c;\n}\n\n.accent-success .dropdown-item:active, .accent-success .dropdown-item.active {\n  background-color: #28a745;\n  color: #fff;\n}\n\n.accent-success .custom-control-input:checked...

import java.util.ArrayList;
import java.util.List;

/**
 * MetadataGraph node - as it's a directed graph - holds adjacency lists for incident and exident nodes
 *
 *
 */
@Deprecated
public class MetadataGraphNode {
    /** node payload */
    MavenArtifactMetadata metadata;

    /** nodes, incident to this (depend on me) */
    List<MetadataGraphNode> inNodes;

    /** nodes, exident to this (I depend on) */

  /**
   * Returns the count of {@code node}'s incident edges, counting self-loops twice (equivalently,
   * the number of times an edge touches {@code node}).
   *
   * <p>For directed graphs, this is equal to {@code inDegree(node) + outDegree(node)}.
   *
   * <p>For undirected graphs, this is equal to {@code incidentEdges(node).size()} + (number of
   * self-loops incident to {@code node}).
   *

    directedGraph.putEdge(N1, N2);
    directedGraph.putEdge(N2, N1);
    directedGraph.putEdge(N1, N3); // only incident to one node in nodeSubset
    directedGraph.putEdge(N4, N4);
    directedGraph.putEdge(5, 6); // not incident to any node in nodeSubset

    MutableGraph<Integer> expectedSubgraph = GraphBuilder.directed().allowsSelfLoops(true).build();
    expectedSubgraph.putEdge(N1, N2);

# Windows .bat files are known to have multiple bugs when run with LF
# endings, and so they are checked in with CRLF endings, with a test
# in test/winbatch.go to catch problems. (See golang.org/issue/37791.)
#
# We'll prevent accidental CRLF line endings from entering the repo
# via the git-codereview gofmt checks and tests.
#
# See golang.org/issue/9281.

    IncidentEdgeSet<N> incident =
        new IncidentEdgeSet<N>(this, node, IncidentEdgeSet.EdgeType.BOTH) {
          @Override
          public Iterator<EndpointPair<N>> iterator() {
            return connections.incidentEdgeIterator(node);
          }
        };
    return nodeInvalidatableSet(incident, node);
  }

  @Override