assertThrows(Graph.CycleDetectedException.class, () -> graph.addEdge("a2", "a1"));
    }

    @Test
    public void testPerf() throws IOException {
        List<String[]> data = new ArrayList<>();
        String k = null;
        for (String line : Files.readAllLines(Paths.get("src/test/resources/dag.txt"))) {
            if (line.startsWith("\t")) {
                data.add(new String[] {k, line.trim()});
            } else {

                    "properties": {
                        "name": {"type": "string", "title": "Name"},
                        "description": {
                            "anyOf": [{"type": "string"}, {"type": "null"}],
                            "title": "Description",
                        },
                    },
                    "type": "object",
                    "required": ["name"],

                    "properties": {
                        "name": {"type": "string", "title": "Name"},
                        "description": {
                            "anyOf": [{"type": "string"}, {"type": "null"}],
                            "title": "Description",
                        },
                    },
                    "type": "object",
                    "required": ["name"],

      Collection<Subscriber> eventMethodsInListener = entry.getValue();

      CopyOnWriteArraySet<Subscriber> eventSubscribers = subscribers.get(eventType);

      if (eventSubscribers == null) {
        CopyOnWriteArraySet<Subscriber> newSet = new CopyOnWriteArraySet<>();
        eventSubscribers =
            MoreObjects.firstNonNull(subscribers.putIfAbsent(eventType, newSet), newSet);
      }

  protected void checkCanCreate() {
    if (subjectGenerator == null) {
      throw new IllegalStateException("Call using() before createTestSuite().");
    }
    if (name == null) {
      throw new IllegalStateException("Call named() before createTestSuite().");
    }
    if (features == null) {
      throw new IllegalStateException("Call withFeatures() before createTestSuite().");
    }
  }

 * according to the value ordering.
 *
 * <p>The multimap does not store duplicate key-value pairs. Adding a new key-value pair equal to an
 * existing key-value pair has no effect.
 *
 * <p>Null keys and values are permitted (provided, of course, that the respective comparators
 * support them). All optional multimap methods are supported, and all returned views are
 * modifiable.
 *

        return analyzerSettings.new DefaultContentsAnalyzer();
    }

    public static List<String> getAsList(final Object value) {
        if (value == null) {
            return new ArrayList<>();
        }

        if (value instanceof String) {
            final List<String> list = new ArrayList<>();
            list.add(value.toString());

            }


            private Address wrap ( String hostname, Address byName ) {
                NetbiosAddress nbt = byName.unwrap(NetbiosAddress.class);
                if ( nbt != null ) {
                    return new UniAddress(this.replacementNetbios);
                }

                return new UniAddress(this.replacementINET);
            }

            String[] alphabets;
            if (i + 1 < text.length() && convertMap.get(text.substring(i, i + 2)) != null) {
                alphabets = convertMap.get(text.substring(i, i + 2));
                i += 2;
            } else {
                if (convertMap.get(text.substring(i, i + 1)) != null) {
                    alphabets = convertMap.get(text.substring(i, i + 1));
                } else {

    }

    @SuppressWarnings("deprecation")
    public static String getSearchEngineHttpAddress() {
        final String value = System.getProperty(Constants.FESS_SEARCH_ENGINE_HTTP_ADDRESS);
        if (value != null) {
            return value;
        }
        return System.getProperty(Constants.FESS_ES_HTTP_ADDRESS);
    }