// The result of Arrays.asList() is mutable
    otherWay.set(0, "FOO");
    assertEquals("FOO", otherWay.get(0));

    // But it can't grow
    assertThrows(UnsupportedOperationException.class, () -> otherWay.add("nope"));

    // And it can't shrink
    assertThrows(UnsupportedOperationException.class, () -> otherWay.remove(2));
  }

  @J2ktIncompatible
  @GwtIncompatible // SerializableTester

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```release-note

```

  @After
  public void validateUndirectedEdges() {
    for (Integer node : graph.nodes()) {
      new EqualsTester()
          .addEqualityGroup(
              graph.predecessors(node), graph.successors(node), graph.adjacentNodes(node))
          .testEquals();
    }
  }

  @Override
  @Test
  public void nodes_checkReturnedSetMutability() {

          transitiveClosure.putEdge(node, reachableNode);
        }
      }
    } else {
      // An optimization for the undirected case: for every node B reachable from node A,
      // node A and node B have the same reachability set.
      Set<N> visitedNodes = new HashSet<>();
      for (N node : graph.nodes()) {
        if (!visitedNodes.contains(node)) {
          Set<N> reachableNodes = reachableNodes(graph, node);

          transitiveClosure.putEdge(node, reachableNode);
        }
      }
    } else {
      // An optimization for the undirected case: for every node B reachable from node A,
      // node A and node B have the same reachability set.
      Set<N> visitedNodes = new HashSet<>();
      for (N node : graph.nodes()) {
        if (!visitedNodes.contains(node)) {
          Set<N> reachableNodes = reachableNodes(graph, node);

  @After
  public void validateUndirectedEdges() {
    for (Integer node : graph.nodes()) {
      new EqualsTester()
          .addEqualityGroup(
              graph.predecessors(node), graph.successors(node), graph.adjacentNodes(node))
          .testEquals();
    }
  }

  @Override
  @Test
  public void nodes_checkReturnedSetMutability() {

     * Processes Google on/off comment directives in the node.
     *
     * @param node the node to process
     * @param flag the flag indicating whether content should be included
     * @return the processed node
     */
    protected Node processGoogleOffOn(final Node node, final ValueHolder<Boolean> flag) {
        final NodeList nodeList = node.getChildNodes();
        List<Node> removedNodeList = null;

  /**
   * A value class representing single connection between the origin node and another node.
   *
   * <p>There can be two types of connections (predecessor and successor), which is represented by
   * the two implementations.
   */
  private abstract static class NodeConnection<N> {
    final N node;

    NodeConnection(N node) {
      this.node = checkNotNull(node);
    }

    static final class Pred<N> extends NodeConnection<N> {

 * {@link UnsupportedOperationException} when they are not implemented. Most implementations should
 * support either all add operations or none of them, all removal operations or none of them, and if
 * and only if all of these are supported, the {@code setCount} methods as well.
 *
 * <p>A multiset uses {@link Object#equals} to determine whether two instances should be considered

     */
    private @Nullable ExampleStackTrace findPathTo(LockGraphNode node, Set<LockGraphNode> seen) {
      if (!seen.add(this)) {
        return null; // Already traversed this node.
      }
      ExampleStackTrace found = allowedPriorLocks.get(node);
      if (found != null) {
        return found; // Found a path ending at the node!
      }
      // Recurse the edges.