private enum ToStringFunction implements Function<Object, String> {
    INSTANCE;

    @Override
    public String apply(Object o) {
      checkNotNull(o); // eager for GWT.
      return o.toString();
    }

    @Override
    public String toString() {
      return "Functions.toStringFunction()";
    }
  }

  /**
   * Returns the identity function.
   *

        @DisplayName("should return null for invalid Artifact scenarios")
        void shouldReturnNullForInvalidGAVScenarios(
                String groupId, String artifactId, String version, String description) throws Exception {
            String pomXml = PomBuilder.create()
                    .groupId(groupId)
                    .artifactId(artifactId)
                    .version(version)

    /**
     * Search criteria: authentication ID.
     */
    public String id;

    /**
     * Search criteria: port number.
     */
    public String port;

    /**
     * Search criteria: username.
     */
    public String username;

    /**
     * Search criteria: web configuration ID.
     */
    public String webConfigId;

    /**
     * Search criteria: creator user.
     */

    /** Boost document ID for search filtering. */
    public String id;

    /** URL expression for search filtering. */
    public String urlExpr;

    /** Boost expression for search filtering. */
    public String boostExpr;

    /** Sort order for search filtering. */
    public String sortOrder;

    /** Creator username for search filtering. */
    public String createdBy;

    /** Creation time for search filtering. */

   */
  private class AlpnProvider(
    /** This peer's supported protocols. */
    private val protocols: List<String>,
  ) : InvocationHandler {
    /** Set when remote peer notifies ALPN is unsupported. */
    var unsupported: Boolean = false

    /** The protocol the server selected. */
    var selected: String? = null

    @Throws(Throwable::class)
    override fun invoke(
      proxy: Any,
      method: Method,

   */
  private final Equivalence<? super T> equivalence;

  private final String relationshipName;
  private final String hashName;
  private final ItemReporter itemReporter;
  private final List<ImmutableList<T>> groups = new ArrayList<>();

  RelationshipTester(
      Equivalence<? super T> equivalence,
      String relationshipName,
      String hashName,
      ItemReporter itemReporter) {

type Help struct {
	SubSys          string         `json:"subSys"`
	Description     string         `json:"description"`
	MultipleTargets bool           `json:"multipleTargets"`
	KeysHelp        config.HelpKVS `json:"keysHelp"`
}

// GetHelp - returns help for sub-sys, a key for a sub-system or all the help.
func GetHelp(subSys, key string, envOnly bool) (Help, error) {
	if len(subSys) == 0 {

		t.Fatal(err)
	}
	// Failure case where we detected successfully cross device mounts.
	{
		absPaths := []string{"/path/to/1"}
		if err = checkCrossDevice(absPaths, mountsPath); err == nil {
			t.Fatal("Expected to fail, but found success")
		}

		mp := []mountInfo{
			{"/dev/2", "/path/to/1/2", "type2", []string{"flags"}, "2", "2"},
		}

    void testConstructorWithMessage() {
        String testMessage = "This is a test message for NdrException.";
        NdrException exception = new NdrException(testMessage);
        assertEquals(testMessage, exception.getMessage(), "The exception message should match the input message.");
    }

    /**
     * Test the NO_NULL_REF static field.
     * Ensures that the static field holds the expected string value.
     */
    @Test

    /**
     * Constructor.
     */
    public ScriptExecutor() {
        super();
    }

    @Override
    public Object execute(final String scriptType, final String script) {
        final Map<String, Object> params = new HashMap<>();
        params.put("executor", this);

        return ComponentUtil.getScriptEngineFactory().getScriptEngine(scriptType).evaluate(script, params);
    }