synchronized (Deferred.this) {
            if (response != null || error != null) {
                return;
            }
            response = r;

            executeCallbacks = new ArrayList<>(doneCallbacks.size());
            Consumer<RESPONSE> callback;
            while ((callback = doneCallbacks.poll()) != null) {
                executeCallbacks.add(callback);
            }
        }

         *
         * @param dependencies the direct dependencies, may be {@code null}
         * @return this request for chaining, never {@code null}
         */
        @Nonnull
        public DependencyResolverRequestBuilder dependencies(@Nullable List<DependencyCoordinates> dependencies) {
            this.dependencies = (dependencies != null) ? dependencies : Collections.emptyList();
            return this;
        }

    public ArtifactMetadataRetrievalException(String message) {
        super(message, null, null);
    }

    /**
     * @param cause a cause
     * @deprecated use {@link #ArtifactMetadataRetrievalException(String, Throwable, Artifact)}
     */
    @Deprecated
    public ArtifactMetadataRetrievalException(Throwable cause) {
        super(null, cause, null);
    }

    /**
     * @param message a message

            return null;
        }

        for (final FtpAuthentication auth : authenticationList) {
            if (auth.matches(path)) {
                return auth;
            }
        }
        return null;
    }

    public void run() {
      // If either of these reads return null then we must be after a successful cancel or another
      // call to this method.
      TimeoutFuture<V> timeoutFuture = timeoutFutureRef;
      if (timeoutFuture == null) {
        return;
      }
      @RetainedLocalRef ListenableFuture<V> delegate = timeoutFuture.delegateRef;
      if (delegate == null) {
        return;
      }

      /*

    protected void assertObjectNotNull(String variableName, Object value) {
        if (variableName == null) {
            String msg = "The value should not be null: variableName=null value=" + value;
            throw new IllegalArgumentException(msg);
        }
        if (value == null) {
            String msg = "The value should not be null: variableName=" + variableName;
            throw new IllegalArgumentException(msg);
        }

     *
     * @param in the input file (must not be {@literal null})
     * @param inputEncoding the input file encoding (must not be {@literal null} or empty)
     * @param out the output file (must not be {@literal null})
     * @param outputEncoding the output file encoding (must not be {@literal null} or empty)
     * @return the number of characters copied
     */

        // Test with null values
        result = jobExecutor.execute(null, "script");
        assertEquals("Executed: null script", result);

        result = jobExecutor.execute("type", null);
        assertEquals("Executed: type null", result);

        result = jobExecutor.execute(null, null);
        assertEquals("Executed: null null", result);

        // Test with empty strings

     * @param stream the input stream to parse
     * @param charsetName the character encoding to use
     * @return the parsed RobotsTxt object, or null if disabled
     */
    public RobotsTxt parse(final InputStream stream, final String charsetName) {
        if (!enabled) {
            return null;
        }

        try {
            @SuppressWarnings("resource")

        // Test constructor with null message
        PluginException exception = new PluginException(null);

        assertNotNull(exception);
        assertNull(exception.getMessage());
        assertNull(exception.getCause());
    }

    public void test_constructor_withNullMessageAndCause() {
        // Test constructor with null message and null cause