* @param schema
     *            Schema file. Must not be {@literal null}.
     * @return {@link Schema}
     */
    public static Schema newSchema(final SchemaFactory factory, final File schema) {
        assertArgumentNotNull("factory", factory);
        assertArgumentNotNull("schema", schema);

        try {
            return factory.newSchema(schema);

    assertTrue(multimap().putAll(k0(), newArrayList(v3(), null)));
    assertGet(k0(), v0(), v3(), null);
  }

  @MapFeature.Require({SUPPORTS_PUT, ALLOWS_NULL_VALUES})
  public void testPutAllNullValueOnAbsentKey_supported() {
    assertTrue(multimap().putAll(k3(), newArrayList(v3(), null)));
    assertGet(k3(), v3(), null);
  }

  @MapFeature.Require(value = SUPPORTS_PUT, absent = ALLOWS_NULL_VALUES)

            final byte[] unicodeHash) {
        if (domain == null || username == null || ansiHash == null || unicodeHash == null) {
            throw new IllegalArgumentException("External credentials cannot be null");
        }
        this.domain = domain;
        this.username = username;
        this.password = null;
        this.challenge = challenge;
        this.ansiHash = ansiHash;

        if (this == obj)
            return true;
        if (obj == null || getClass() != obj.getClass())
            return false;
        NetworkInterfaceInfo that = (NetworkInterfaceInfo) obj;
        return interfaceIndex == that.interfaceIndex && address != null ? address.equals(that.address) : that.address == null;
    }

    @Override
    public int hashCode() {
        int result = interfaceIndex;

             * is serviced. The alternative complicates things
             * more than I think is worth it.
             */

            if (socket != null) {
                socket.close();
                socket = null;
            }
            thread = null;
            responseTable.clear();
        }
    }

    @Override
    public void run() {
        int nameTrnId;

        fileTypeHelper.add(null, "test");
        assertEquals("test", fileTypeHelper.get(null));
    }

    public void test_add_withEmptyMimetype() {
        fileTypeHelper.add("", "empty");
        assertEquals("empty", fileTypeHelper.get(""));
    }

    public void test_add_withNullFiletype() {
        fileTypeHelper.add("test/null", null);

  public void testPutIfAbsent_nullKeyUnsupported() {
    assertThrows(NullPointerException.class, () -> getMap().putIfAbsent(null, v3()));
    expectUnchanged();
    expectNullKeyMissingWhenNullKeysUnsupported(
        "Should not contain null key after unsupported putIfAbsent(null, value)");
  }

  @MapFeature.Require(value = SUPPORTS_PUT, absent = ALLOWS_NULL_VALUES)

        assertDoesNotThrow(() -> resp.writeParametersWireFormat(null, 0));
        assertDoesNotThrow(() -> resp.writeDataWireFormat(null, 0));
        assertDoesNotThrow(() -> resp.readSetupWireFormat(null, 0, 0));
        assertDoesNotThrow(() -> resp.readParametersWireFormat(null, 0, 0));
        assertDoesNotThrow(() -> resp.readDataWireFormat(null, 0, 0));

  public void testContainsEntryNullYes() {
    initMultimapWithNullKeyAndValue();
    assertTrue(multimap().containsEntry(null, null));
  }

  @MapFeature.Require({ALLOWS_NULL_KEY_QUERIES, ALLOWS_NULL_VALUE_QUERIES})
  public void testContainsEntryNullNo() {
    assertFalse(multimap().containsEntry(null, null));
  }

  @MapFeature.Require(absent = ALLOWS_NULL_KEY_QUERIES)

        assertNull(exception.getCause());
        assertNull(exception.getMessage());
        assertTrue(exception instanceof FessSystemException);
    }

    public void test_constructorWithNullMessageAndCause() {
        // Test constructor with null message and null cause
        SearchQueryException exception = new SearchQueryException(null, null);

        assertNull(exception.getMessage());