* @since 27.1
   */
  @Nullable V edgeValueOrDefault(EndpointPair<N> endpoints, @Nullable V defaultValue);

  //
  // ValueGraph identity
  //

  /**
   * Returns {@code true} iff {@code object} is a {@link ValueGraph} that has the same elements and
   * the same structural relationships as those in this graph.
   *
   * <p>Thus, two value graphs A and B are equal if <b>all</b> of the following are true:

   *
   * @since 27.1
   */
  @Override
  boolean hasEdgeConnecting(EndpointPair<N> endpoints);

  //
  // Network identity
  //

  /**
   * Returns {@code true} iff {@code object} is a {@link Network} that has the same elements and the
   * same structural relationships as those in this network.
   *
   * <p>Thus, two networks A and B are equal if <b>all</b> of the following are true:
   *

   */
  @DoNotCall("Elements must be Comparable. (Or, pass a Comparator to orderedBy or copyOf.)")
  @Deprecated
  // The usage of "Z" here works around bugs in Javadoc (JDK-8318093) and JDiff.
  public static <Z> ImmutableSortedMultiset<Z> copyOf(Z[] elements) {
    throw new UnsupportedOperationException();
  }

  @J2ktIncompatible private static final long serialVersionUID = 0xcafebabe;

                "- change formatting or whitespace unless absolutely required.",
                "Only change what must be changed. The goal is to minimize diffs for easier human review.",

 *       tests.
 * </ul>
 */
@SuppressWarnings({
  // We call threadUnexpectedException, which does the right thing for errors.
  "AssertionFailureIgnored",
  // We're following the upstream naming to reduce diffs.
  "IdentifierName",
  "ConstantCaseForConstants",
})
@NullUnmarked
abstract class JSR166TestCase extends TestCase {
  protected static final boolean expensiveTests = Boolean.getBoolean("jsr166.expensiveTests");

* 🔧 Update sponsors: Add Railway. PR [#13953](https://github.com/fastapi/fastapi/pull/13953) by [@tiangolo](https://github.com/tiangolo).
* ⚒️ Update translate script, update prompt to minimize generated diff. PR [#13947](https://github.com/fastapi/fastapi/pull/13947) by [@YuriiMotov](https://github.com/YuriiMotov).

   */
  @DoNotCall("Elements must be Comparable. (Or, pass a Comparator to orderedBy or copyOf.)")
  @Deprecated
  // The usage of "Z" here works around bugs in Javadoc (JDK-8318093) and JDiff.
  public static <Z> ImmutableSortedMultiset<Z> copyOf(Z[] elements) {
    throw new UnsupportedOperationException();
  }

  @J2ktIncompatible private static final long serialVersionUID = 0xdecaf;

     * the elem field without a null check by calling getElement().
     */
    private final @Nullable E elem;

    // elemCount is 0 iff this node has been deleted.
    private int elemCount;

    private int distinctElements;
    private long totalCount;
    private int height;
    private @Nullable AvlNode<E> left;

github.com/aymanbagabas/go-osc52/v2 v2.0.1/go.mod h1:uYgXzlJ7ZpABp8OJ+exZzJJhRNQ2ASbcXHWsFqH8hp8=
github.com/aymanbagabas/go-udiff v0.2.0 h1:TK0fH4MteXUDspT88n8CKzvK0X9O2xu9yQjWpi6yML8=
github.com/aymanbagabas/go-udiff v0.2.0/go.mod h1:RE4Ex0qsGkTAJoQdQQCA0uG+nAzJO/pI/QwceO5fgrA=
github.com/beevik/ntp v1.4.3 h1:PlbTvE5NNy4QHmA4Mg57n7mcFTmr1W1j3gcK7L1lqho=

     * the elem field without a null check by calling getElement().
     */
    private final @Nullable E elem;

    // elemCount is 0 iff this node has been deleted.
    private int elemCount;

    private int distinctElements;
    private long totalCount;
    private int height;
    private @Nullable AvlNode<E> left;