*
   * <p><b>Note:</b> {@code a.asSet(d).equals(b.asSet(d))} does not imply {@code a.equals(b)}! For
   * example, {@code a} and {@code b} could be {@code [2..4]} and {@code (1..5)}, or the empty
   * ranges {@code [3..3)} and {@code [4..4)}.
   *
   * <p><b>Warning:</b> Be extremely careful what you do with the {@code asSet} view of a large

   *
   * <p><b>Note:</b> {@code a.asSet(d).equals(b.asSet(d))} does not imply {@code a.equals(b)}! For
   * example, {@code a} and {@code b} could be {@code [2..4]} and {@code (1..5)}, or the empty
   * ranges {@code [3..3)} and {@code [4..4)}.
   *
   * <p><b>Warning:</b> Be extremely careful what you do with the {@code asSet} view of a large

    Set<String> expected = Collections.singleton("a");
    assertEquals(expected, Optional.of("a").asSet());
  }

  public void testAsSet_absent() {
    assertTrue("Returned set should be empty", Optional.absent().asSet().isEmpty());
  }

  public void testAsSet_presentIsImmutable() {
    Set<String> presentAsSet = Optional.of("a").asSet();
    try {
      presentAsSet.add("b");
      fail();

    public static Test suite() {
      TestSuite suite = new TestSuite();

      suite.addTest(
          NavigableSetTestSuiteBuilder.using(new ContiguousSetGenerator())
              .named("Range.asSet")
              .withFeatures(
                  CollectionSize.ANY,
                  KNOWN_ORDER,
                  ALLOWS_NULL_QUERIES,
                  NON_STANDARD_TOSTRING,

    function_aliases: Function name -> function alias mapping.
    asset_file_defs: `AssetFileDef`s that associates the asset files and the
      name of the tensors to which the asset file names should be fed. The
      caller should make sure the asset files exist in the output saved model
      directory.

  Raises:
    ValueError iff the graph does not contain a valid signature or the file

  "tf_saved_model.session_initializer"() {initializers = [@NoOp]} : () -> ()
  "tf_saved_model.asset"() {filename = "assets/mydata.txt", sym_name = "__tf_saved_model_asset0_mydata.txt"} : () -> ()
// Session initializer ops and asset ops untouched.
// CHECK: "tf_saved_model.session_initializer"() <{initializers = [@NoOp]}> : () -> ()
// CHECK: "tf_saved_model.asset"() <{filename = "assets/mydata.txt", sym_name = "__tf_saved_model_asset0_mydata.txt"}> : () -> ()

        ImmutableSet<ImmutableCapability> providerCapabilitiesSet = providerCapabilities.asSet();
        if (providerCapabilitiesSet.isEmpty()) {
            // producer doesn't declare anything, so we assume that it only provides the implicit capability
            if (explicitRequestedCapabilities.size() == 1) {

  mlir::OwningOpRef<mlir::ModuleOp> module_op = ParseModuleOpString(R"mlir(
    module attributes {tf_saved_model.semantics} {
      "tf_saved_model.session_initializer"() <{initializers = []}> : () -> ()
      "tf_saved_model.asset"() <{filename = "assets/vocab_file.txt", sym_name = "__tf_saved_model_asset0_vocab_file.txt"}> : () -> ()

   *
   * <p><b>Comparison to {@code java.util.Optional}:</b> this method has no equivalent in Java 8's
   * {@code Optional} class. However, this common usage:
   *
   * <pre>{@code
   * for (Foo foo : possibleFoo.asSet()) {
   *   doSomethingWith(foo);
   * }
   * }</pre>
   *
   * ... can be replaced with:
   *
   * <pre>{@code
   * possibleFoo.ifPresent(foo -> doSomethingWith(foo));
   * }</pre>
   *

   *
   * <p><b>Comparison to {@code java.util.Optional}:</b> this method has no equivalent in Java 8's
   * {@code Optional} class. However, this common usage:
   *
   * <pre>{@code
   * for (Foo foo : possibleFoo.asSet()) {
   *   doSomethingWith(foo);
   * }
   * }</pre>
   *
   * ... can be replaced with:
   *
   * <pre>{@code
   * possibleFoo.ifPresent(foo -> doSomethingWith(foo));
   * }</pre>
   *