public void testContains_nullNotContainedButAllowed() {
    assertFalse("containsKey(null) should return false", getMap().containsKey(null));
  }

  @MapFeature.Require(absent = ALLOWS_NULL_KEY_QUERIES)
  public void testContains_nullNotContainedAndUnsupported() {
    expectNullKeyMissingWhenNullKeysUnsupported("containsKey(null) should return false or throw");
  }

  @MapFeature.Require(ALLOWS_NULL_KEYS)

     *
     * @param pomFile The POM file, must not be {@code null}.
     * @deprecated Use {@link #FileModelSource(Path)} instead.
     */
    @Deprecated
    public FileModelSource(File pomFile) {
        super(pomFile);
    }

    /**
     * Creates a new model source backed by the specified file.
     *
     * @param pomPath The POM file, must not be {@code null}.
     * @since 4.0.0
     */

    // [[null, null], [null], [1, null, 2], [1, 1], [1, 2], [1], [2], [], null]
    assertThat(sorted)
        .containsExactly(
            Lists.<@Nullable Integer>newArrayList(nullInt, nullInt),
            Lists.<@Nullable Integer>newArrayList(nullInt),
            Lists.<@Nullable Integer>newArrayList(1, null, 2),
            Lists.newArrayList(1, 1),
            Lists.newArrayList(1, 2),

    // [[null, null], [null], [1, null, 2], [1, 1], [1, 2], [1], [2], [], null]
    assertThat(sorted)
        .containsExactly(
            Lists.<@Nullable Integer>newArrayList(nullInt, nullInt),
            Lists.<@Nullable Integer>newArrayList(nullInt),
            Lists.<@Nullable Integer>newArrayList(1, null, 2),
            Lists.newArrayList(1, 1),
            Lists.newArrayList(1, 2),

                "hoge.pptx");

        assertContentType("image/jpeg", null, "hoge.jpg");
        assertContentType("image/gif", null, "hoge.gif");

        assertContentType("application/pdf", "extractor/test.pdf", "hoge.pdf");

        assertContentType("application/gzip", "extractor/gz/test.tar.gz", "hoge.tar.gz");

        return RandomStringUtils.random(ComponentUtil.getFessConfig().getApiAccessTokenLengthAsInteger(), 0, 0, true, true, null, random);
    }

    public String getAccessTokenFromRequest(final HttpServletRequest request) {
        final String token = request.getHeader("Authorization");
        if (token != null) {
            final String[] values = token.trim().split(" ");
            if (values.length == 2 && BEARER.equals(values[0])) {

                return matcher.group(3);
            }
            return null;
        }).filter(s -> s != null).toArray(n -> new String[n]);
    }

    public static int getJavaVersion() {
        final String javaVersion = System.getProperty("java.version");
        int version = 8;
        if (javaVersion != null) {
            final String[] split = javaVersion.split("[\\._]");
            if (split.length > 0) {

     *
     * @param model The model whose report plugin configuration should be expanded, must not be <code>null</code>.
     * @param request The model building request that holds further settings, must not be {@code null}.
     * @param problems The container used to collect problems that were encountered, must not be {@code null}.
     */
    void expandPluginConfiguration(Model model, ModelBuildingRequest request, ModelProblemCollector problems);

     * @param message The detail message of the problem, may be {@code null}.
     * @param line The one-based index of the line containing the problem or {@code -1} if unknown.
     * @param column The one-based index of the column containing the problem or {@code -1} if unknown.
     * @param cause The cause of the problem, may be {@code null}.
     */

    } catch (e: InvocationTargetException) {
      // https://github.com/square/okhttp/issues/5587
      val cause = e.cause
      when {
        cause is NullPointerException && cause.message == "ssl == null" -> null
        else -> throw AssertionError(e)
      }
    }
  }

  companion object {
    val playProviderFactory: DeferredSocketAdapter.Factory =
      factory("com.google.android.gms.org.conscrypt")

    /**