Multiset<String> ms1 = HashMultiset.create(asList("a", "b", "a"));
    Multiset<String> ms2 = HashMultiset.create();
    assertThat(intersection(ms1, ms2)).isEmpty();
  }

  public void testSum() {
    Multiset<String> ms1 = HashMultiset.create(asList("a", "b", "a"));
    Multiset<String> ms2 = HashMultiset.create(asList("b", "c"));
    assertThat(sum(ms1, ms2)).containsExactly("a", "a", "b", "b", "c");
  }

            // Domains: single domain named TESTDOM
            lsarpc.LsarRefDomainList domains = new lsarpc.LsarRefDomainList();
            domains.count = 1;
            domains.max_count = 1;
            domains.domains = new lsarpc.LsarTrustInformation[1];
            domains.domains[0] = new lsarpc.LsarTrustInformation();
            domains.domains[0].name = new UnicodeString("TESTDOM", false);

    assertThrows(NullPointerException.class, () -> copyOf((Collection<String>) c));
  }

  enum TestEnum {
    A,
    B,
    C,
    D
  }

  public void testCopyOf_collection_enumSet() {
    Collection<TestEnum> c = EnumSet.of(TestEnum.A, TestEnum.B, TestEnum.D);
    Set<TestEnum> set = copyOf(c);
    assertEquals(3, set.size());
    assertEquals(c, set);
  }

  @J2ktIncompatible
  @GwtIncompatible // NullPointerTester
  @Override
  public void testNullPointerInstance() {}

  // put() and putAll() aren't supported.
  @Override
  public void testPut() {
    assertThrows(UnsupportedOperationException.class, () -> table.put("foo", 1, 'a'));
    assertSize(0);
  }

  @Override
  public void testPutAllTable() {

        NetShareEnum testEnum = new NetShareEnum(realConfig) {
            @Override
            protected int writeParametersWireFormat(byte[] dst, int dstIndex) {
                // Simulate the encoding exception path
                return 0;
            }
        };

        byte[] dst = new byte[256];
        int result = testEnum.writeParametersWireFormat(dst, 0);

  }

  public void testContainsValue() {
    boolean unused = create().containsValue(null);
  }

  public void testGet() {
    Object unused = create().get(null);
  }

  public void testPut() {
    create().put(null, null);
  }

  public void testPutAll() {
    create().putAll(new HashMap<String, Integer>());
  }

  public void testKeySet() {
    Map<String, Integer> map = create();