@Test
  public void outEdges_checkReturnedSetMutability() {
    addNode(N1);
    Set<String> outEdges = network.outEdges(N1);
    UnsupportedOperationException e =
        assertThrows(UnsupportedOperationException.class, () -> outEdges.add(E12));
    addEdge(N1, N2, E12);
    assertThat(network.outEdges(N1)).containsExactlyElementsIn(outEdges);
  }

  @Override
  @Test
  public void predecessors_checkReturnedSetMutability() {

  }

  @Override
  public Set<E> edgesConnecting(N nodeU, N nodeV) {
    Set<E> outEdgesU = outEdges(nodeU);
    Set<E> inEdgesV = inEdges(nodeV);
    return nodePairInvalidatableSet(
        outEdgesU.size() <= inEdgesV.size()
            ? unmodifiableSet(Sets.filter(outEdgesU, connectedPredicate(nodeU, nodeV)))
            : unmodifiableSet(Sets.filter(inEdgesV, connectedPredicate(nodeV, nodeU))),

  }

  @Override
  public Set<E> edgesConnecting(N nodeU, N nodeV) {
    Set<E> outEdgesU = outEdges(nodeU);
    Set<E> inEdgesV = inEdges(nodeV);
    return nodePairInvalidatableSet(
        outEdgesU.size() <= inEdgesV.size()
            ? unmodifiableSet(Sets.filter(outEdgesU, connectedPredicate(nodeU, nodeV)))
            : unmodifiableSet(Sets.filter(inEdgesV, connectedPredicate(nodeV, nodeU))),

    public int outDegree(N node) {
      return delegate().inDegree(node); // transpose
    }

    @Override
    public Set<E> inEdges(N node) {
      return delegate().outEdges(node); // transpose
    }

    @Override
    public Set<E> outEdges(N node) {
      return delegate().inEdges(node); // transpose
    }

    @Override
    public EndpointPair<N> incidentNodes(E edge) {

  /**
   * Returns a live view of the edges whose {@link #incidentNodes(Object) incident nodes} in this
   * network include {@code node}.
   *
   * <p>This is equal to the union of {@link #inEdges(Object)} and {@link #outEdges(Object)}.
   *
   * <p>If {@code node} is removed from the network after this method is called, the {@code Set}
   * {@code view} returned by this method will be invalidated, and will throw {@code

    public int outDegree(N node) {
      return delegate().inDegree(node); // transpose
    }

    @Override
    public Set<E> inEdges(N node) {
      return delegate().outEdges(node); // transpose
    }

    @Override
    public Set<E> outEdges(N node) {
      return delegate().inEdges(node); // transpose
    }

    @Override
    public EndpointPair<N> incidentNodes(E edge) {

  /**
   * Returns a live view of the edges whose {@link #incidentNodes(Object) incident nodes} in this
   * network include {@code node}.
   *
   * <p>This is equal to the union of {@link #inEdges(Object)} and {@link #outEdges(Object)}.
   *
   * <p>If {@code node} is removed from the network after this method is called, the {@code Set}
   * {@code view} returned by this method will be invalidated, and will throw {@code

// mark values
type markKind uint8

const (
	notFound    markKind = iota // block has not been discovered yet
	notExplored                 // discovered and in queue, outedges not processed yet
	explored                    // discovered and in queue, outedges processed
	done                        // all done, in output ordering
)

type backedgesState struct {
	b *Block
	i int
}

			measurement.Percentage(flatSum, rpt.total),
			rpt.formatValue(cum),
			measurement.Percentage(cum, rpt.total),
			name)

		// Print outgoing edges.
		outEdges := n.Out.Sort()
		for _, out := range outEdges {
			var inline string
			if out.Inline {
				inline = " (inline)"
			}
			fmt.Fprintf(w, "%50s %s |   %s%s\n", rpt.formatValue(out.Weight),

  // from an XLA cluster.
  bool check_output_numerics;
};

void MoveOutgoingEdges(Graph* g, Node* old_node, Node* new_node) {
  std::vector<const Edge*> out_edges(old_node->out_edges().begin(),
                                     old_node->out_edges().end());
  for (const Edge* edge : out_edges) {
    // TODO(sanjoy): This does not update NodeDef inputs.  To be able to update
    // NodeDef inputs we first need to fix encapsulate_subgraphs_pass to fix up