private static final Logger logger = Logger.getLogger(StatementUtil.class);

    /**
     * SQLを実行します。
     *
     * @param statement
     *            {@link Statement}。{@literal null}であってはいけません
     * @param sql
     *            SQL文字列。{@literal null}や空文字列であってはいけません
     * @return 実行した結果
     * @see Statement#execute(String)
     */
    public static boolean execute(final Statement statement, final String sql) {

    }

    public void myspecifyPropertyCancel(String propertyName) {
        if (__specifiedProperties != null) {
            __specifiedProperties.remove(propertyName);
        }
    }

    public void clearSpecifiedInfo() {
        if (__specifiedProperties != null) {
            __specifiedProperties.clear();
        }
    }

    protected void checkSpecifiedProperty(String propertyName) {

      cachingHashMap.remove(key);
      return null;
    }
  }

  @CanIgnoreReturnValue
  @Override
  public V put(K key, V value) {
    checkNotNull(key);
    checkNotNull(value);
    Timestamped<V> oldValue = cachingHashMap.put(key, new Timestamped<V>(value, ticker));
    if (oldValue == null) {
      return null;
    }

        if( domain == null || username == null ||
                                    ansiHash == null || unicodeHash == null ) {
            throw new IllegalArgumentException( "External credentials cannot be null" );
        }
        this.domain = domain;
        this.username = username;
        this.password = null;
        this.challenge = challenge;
        this.ansiHash = ansiHash;

        if (pluginDescriptorV4 == null) {
            synchronized (this) {
                if (pluginDescriptorV4 == null) {
                    pluginDescriptorV4 = org.apache.maven.api.plugin.descriptor.PluginDescriptor.newBuilder()
                            .namespaceUri(null)
                            .modelEncoding(null)
                            .name(name)

        System.getProperties().keySet().stream().filter(k -> k != null && k.toString().startsWith(Constants.FESS_CONFIG_PREFIX))
                .forEach(k -> addSystemProperty(cmdList, k.toString(), null, null));
    }

    protected void addFessSystemProperties(final List<String> cmdList) {
        System.getProperties().keySet().stream().filter(k -> k != null && k.toString().startsWith(Constants.SYSTEM_PROP_PREFIX))

        sidecar.istio.io/status: '{"initContainers":["istio-init"],"containers":["istio-proxy"],"volumes":null,"imagePullSecrets":null,"revision":"default"}'
      creationTimestamp: null
      labels:
        app: hello
        tier: backend
        track: stable
    spec:
      containers:
      - image: docker.io/istio/proxy_debug:unittest
        name: istio-proxy
        resources: {}

    Converter<String, Number> converter = Converter.<String, Number>from(forward, backward);

    assertNull(converter.convert(null));
    assertNull(converter.reverse().convert(null));

    assertEquals((Integer) 5, converter.convert("5"));
    assertEquals("5", converter.reverse().convert(5));
  }

  // Null-passthrough violates our nullness annotations, so we don't support it under J2KT.
  @J2ktIncompatible

      val body = response.body
      val streamHandler = response.streamHandler
      val outFinished = (
        body == null &&
          response.pushPromises.isEmpty() &&
          streamHandler == null
      )
      val flushHeaders = body == null || bodyDelayNanos != 0L
      require(!outFinished || trailers.size == 0) {
        "unsupported: no body and non-empty trailers $trailers"
      }

            if ( this.root_directory != null ) {
                _dst = _dst.deferred;
                this.root_directory.encode(_dst);

            }
            if ( this.object_name != null ) {
                _dst = _dst.deferred;
                this.object_name.encode(_dst);

            }
            if ( this.security_quality_of_service != null ) {
                _dst = _dst.deferred;