*         .header("Proxy-Authorization", "secret")
 *         .build();
 *   }
 * }
 * return null; // Didn't find a preemptive auth scheme.
 * ```
 *
 * ## Reactive Authentication
 *
 * Implementations authenticate by returning a follow-up request that includes an authorization
 * header, or they may decline the challenge by returning null. In this case the unauthenticated
 * response will be returned to the caller that triggered it.
 *

                    .thenReturn(null);

            // Perform the renewal
            boolean renewed = wrapper.renewCredentials("locationHint", null);

            // Verify that NtlmAuthenticator was used but credentials were not updated
            assertFalse(renewed, "renewCredentials should return false when NtlmAuthenticator returns null");

        return createOptions(null, null, null, plugins, null);
    }

    /**
     * Creates upgrade options with only the --fix-model option set.
     *
     * @param fixModel the --fix-model option value
     * @return configured upgrade options
     */
    public static UpgradeOptions createOptionsWithFixModel(boolean fixModel) {
        return createOptions(null, null, fixModel, null, null);
    }

    // - Class/Member Variables -/
    // --------------------------/

    /**
     * Field NAMESPACE.
     */
    private static final String NAMESPACE = null;

    /**
     * Field fileComment.
     */
    private String fileComment = null;

    // -----------/
    // - Methods -/
    // -----------/

    /**
     * Method setFileComment.
     *
     * @param fileComment a fileComment object.

                new DefaultType(Type.POM, Language.NONE, "pom", null, false),
                new DefaultType(Type.BOM, Language.NONE, "pom", null, false),
                new DefaultType(Type.MAVEN_PLUGIN, Language.JAVA_FAMILY, "jar", null, false, JavaPathType.CLASSES),
                // Java types
                new DefaultType(
                        Type.JAR, Language.JAVA_FAMILY, "jar", null, false, JavaPathType.CLASSES, JavaPathType.MODULES),

    }

    /**
     * Asserts that the argument is not <code>null</code>.
     *
     * @param argName
     *            The name of the argument that must not be {@code null}.
     * @param argValue
     *            The value of the argument.
     * @throws NullArgumentException
     *             If the argument is <code>null</code>.
     */

        if (!(type instanceof ParameterizedType)) {
            return null;
        }
        final Type[] genericParameter = getGenericParameters(type);
        if (genericParameter == null) {
            return null;
        }
        assertArgumentArrayIndex("index", index, genericParameter.length);
        return genericParameter[index];
    }

    /**

        RoleCQ cq = new RoleCQ();
        if (queryLambda != null) {
            queryLambda.callback(cq);
        }
        FilterAggregationBuilder builder = regFilterA(name, cq.getQuery());
        if (opLambda != null) {
            opLambda.callback(builder);
        }
        if (aggsLambda != null) {
            RoleCA ca = new RoleCA();
            aggsLambda.callback(ca);

     * Validates that the input stream is not null.
     * This is a common validation performed by most extractors.
     *
     * @param in The input stream to validate
     * @throws CrawlerSystemException if the input stream is null
     */
    protected void validateInputStream(final InputStream in) {
        if (in == null) {
            throw new CrawlerSystemException("The inputstream is null.");
        }
    }

        if (endTime != null) {
            addFieldToSource(sourceMap, "endTime", endTime);
        }
        if (jobName != null) {
            addFieldToSource(sourceMap, "jobName", jobName);
        }
        if (jobStatus != null) {
            addFieldToSource(sourceMap, "jobStatus", jobStatus);
        }
        if (lastUpdated != null) {