* @throws IllegalArgumentException if the endpoints are unordered and the network is directed
   * @since 27.1
   */
  Set<E> edgesConnecting(EndpointPair<N> endpoints);

  /**
   * Returns the single edge that directly connects {@code nodeU} to {@code nodeV}, if one is
   * present, or {@code Optional.empty()} if no such edge exists.
   *

        labelType1.setName("Test Label 1");
        labelType1.setValue("test1");
        labelType1.setPermissions(new String[0]);
        labelType1.setVirtualHost("");
        // Locale is derived from value, not set directly
        labelType1.setIncludedPaths("/test.*");
        labelType1.setExcludedPaths("/exclude.*");
        labelTypeList.add(labelType1);

        LabelType labelType2 = new LabelType();

        assertTrue(filename.contains("/"));
    }

    // Test getImageFilename with docid - use the String version directly
    public void test_getImageFilename_withDocId() {
        String docid = "1234567890abcdef";
        // Call the String version directly
        String filename = thumbnailManager.getImageFilename(docid);
        assertNotNull(filename);
        assertTrue(filename.endsWith(".png"));

  @SuppressWarnings("ThrowIfUncheckedKnownUnchecked")
  public void testThrowIfUnchecked_unchecked() {
    assertThrows(
        SomeUncheckedException.class, () -> throwIfUnchecked(new SomeUncheckedException()));
  }

  // We're testing that the method is in fact equivalent to throwing the exception directly.
  @SuppressWarnings("ThrowIfUncheckedKnownUnchecked")

      new HashMap<>();

  private static final Map<Method, TesterRequirements> methodTesterRequirementsCache =
      new HashMap<>();

  /**
   * Given a set of features, add to it all the features directly or indirectly implied by any of
   * them, and return it.
   *
   * @param features the set of features to expand
   * @return the same set of features, expanded with all implied features
   */
  @CanIgnoreReturnValue

/**
 * A generic JUnit test which tests {@code retainAll} operations on a collection. Can't be invoked
 * directly; please see {@link com.google.common.collect.testing.CollectionTestSuiteBuilder}.
 *
 * @author Chris Povirk
 */
@GwtCompatible
@Ignore("test runners must not instantiate and run this directly, only via suites we build")
// @Ignore affects the Android test runner, which respects JUnit 4 annotations on JUnit 3 tests.

   * use the {@code ArrayList} {@linkplain ArrayList#ArrayList() constructor} directly, taking
   * advantage of <a
   * href="https://docs.oracle.com/javase/tutorial/java/generics/genTypeInference.html#type-inference-instantiation">"diamond"
   * syntax</a>.
   */
  @SuppressWarnings("NonApiType") // acts as a direct substitute for a constructor call
  public static <E extends @Nullable Object> ArrayList<E> newArrayList() {

      new HashMap<>();

  private static final Map<Method, TesterRequirements> methodTesterRequirementsCache =
      new HashMap<>();

  /**
   * Given a set of features, add to it all the features directly or indirectly implied by any of
   * them, and return it.
   *
   * @param features the set of features to expand
   * @return the same set of features, expanded with all implied features
   */
  @CanIgnoreReturnValue

        }
    }

    // Test variable replacement logic without triggering component dependencies
    public void test_variable_replacement_logic() throws Exception {
        // Test the variable replacement logic directly
        final List<String> commands =
                Arrays.asList("convert ${url} ${outputFile}", "echo Processing ${url} to ${outputFile}", "cp ${url} ${outputFile}");

        final String tempPath = "/tmp/test.tmp";

  @SuppressWarnings("ThrowIfUncheckedKnownUnchecked")
  public void testThrowIfUnchecked_unchecked() {
    assertThrows(
        SomeUncheckedException.class, () -> throwIfUnchecked(new SomeUncheckedException()));
  }

  // We're testing that the method is in fact equivalent to throwing the exception directly.
  @SuppressWarnings("ThrowIfUncheckedKnownUnchecked")