private enum DfsState {
        VISITING,
        VISITED
    }

    private static List<String> visitCycle(
            Map<String, Set<String>> graph,
            Collection<String> children,
            Map<String, DfsState> stateMap,
            LinkedList<String> cycle) {
        if (children != null) {
            for (String v : children) {
                DfsState state = stateMap.putIfAbsent(v, DfsState.VISITING);

                new TestStringSetGenerator() {
                  @Override
                  protected Set<String> create(String[] elements) {
                    Set<String> difference = newHashSet(elements);
                    Set<String> set = newHashSet(samples());
                    set.addAll(difference);
                    Set<String> subset = newHashSet(samples());
                    subset.removeAll(difference);

    }

    /**
     * Returns an iterator over the lines in the string. If the string ends in a newline, a final
     * empty string is not included, to match the behavior of BufferedReader/LineReader.readLine().
     */
    private Iterator<String> linesIterator() {
      return new AbstractIterator<String>() {
        final Iterator<String> lines = LINE_SPLITTER.split(seq).iterator();

        @Override

    }

    /**
     * Returns an iterator over the lines in the string. If the string ends in a newline, a final
     * empty string is not included, to match the behavior of BufferedReader/LineReader.readLine().
     */
    private Iterator<String> linesIterator() {
      return new AbstractIterator<String>() {
        final Iterator<String> lines = LINE_SPLITTER.split(seq).iterator();

        @Override

	gorm.Model
	UserID sql.NullInt64
	Number string
}

type Pet struct {
	gorm.Model
	UserID *uint
	Name   string
	Toy    Toy `gorm:"polymorphic:Owner;"`
}

type Toy struct {
	gorm.Model
	Name      string
	OwnerID   string
	OwnerType string
}

type Tools struct {
	gorm.Model
	Name     string
	CustomID string
	Type     string
}

type Company struct {
	ID   int

     */
    public static class ContentTransformer implements Transformer {
        private final String name;
        private final Map<String, String> transformationRules = new HashMap<>();

        public ContentTransformer(String name) {
            this.name = name;
        }

        public void addTransformationRule(String pattern, String replacement) {
            transformationRules.put(pattern, replacement);
        }

        // ======================
        String ALL = "all";
        String EACH = "each";
        String BUILD = "build";
        String INITIALIZE = "initialize";
        String VALIDATE = "validate";
        String SOURCES = "sources";
        String RESOURCES = "resources";
        String COMPILE = "compile";
        String READY = "ready";
        String PACKAGE = "package";
        String VERIFY = "verify";

    }

    /**
     * Retrieves a string value from system properties with a default fallback.
     *
     * @param key the property key to look up
     * @param defaultValue the default value if the property is not found
     * @return the string value or default value
     */
    protected String getDefaultString(final String key, final String defaultValue) {
        final String value = systemProperties.getProperty(key);

    assertThat(challenges.size).isEqualTo(1)
    assertThat(challenges[0].scheme).isEqualTo("Digest")
    assertThat(challenges[0].realm).isEqualTo("myrealm")
    val expectedAuthParams = mutableMapOf<String, String>()
    expectedAuthParams["realm"] = "myrealm"
    expectedAuthParams["nonce"] = "fjalskdflwejrlaskdfjlaskdjflaksjdflkasdf"
    expectedAuthParams["qop"] = "auth"
    expectedAuthParams["stale"] = "FALSE"

// configuration name.
func (r Config) GetUserReadableClaim(cfgName string) string {
	pCfg, ok := r.ProviderCfgs[cfgName]
	if ok {
		return pCfg.UserReadableClaim
	}
	return ""
}

// GetUserIDClaim returns the user ID claim for the given configuration name, or "sub" if not set.
func (r Config) GetUserIDClaim(cfgName string) string {
	pCfg, ok := r.ProviderCfgs[cfgName]
	if ok {
		if pCfg.UserIDClaim != "" {