companion object {
    /**
     * Returns a new request body that transmits this string. If [contentType] is non-null and lacks
     * a charset, this will use UTF-8.
     */
    @JvmStatic
    @JvmName("create")
    fun String.toRequestBody(contentType: MediaType? = null): RequestBody {
      val (charset, finalContentType) = contentType.chooseCharset()
      val bytes = toByteArray(charset)

   */
  protected Entry<K, V>[] createArrayWithNullValue() {
    Entry<K, V>[] array = createSamplesArray();
    int nullValueLocation = getNullLocation();
    Entry<K, V> oldEntry = array[nullValueLocation];
    array[nullValueLocation] = mapEntry(oldEntry.getKey(), null);
    return array;
  }

  /**

        ) {
          webSocket.send(text)
        }

        override fun onClosing(
          webSocket: WebSocket,
          code: Int,
          reason: String,
        ) {
          webSocket.close(1000, null)
          latch.countDown()
        }

        override fun onFailure(
          webSocket: WebSocket,
          t: Throwable,
          response: Response?,
        ) {

  }

  public void testCloseNull() throws IOException {
    Closeables.close(null, true);
    Closeables.close(null, false);
  }

  public void testCloseQuietlyNull_inputStream() {
    Closeables.closeQuietly((InputStream) null);
  }

  public void testCloseQuietlyNull_reader() {
    Closeables.closeQuietly((Reader) null);
  }

  // Set up a closeable to expect to be closed, and optionally to throw an

    }

    private String emptify(String string) {
        return (string != null) ? string : "";
    }

    public File getFile() {
        return null;
    }

    public MetadataBridge setFile(File file) {
        return this;
    }

    @Override
    public Path getPath() {
        return null;
    }

    public Nature getNature() {

    @Override
    public Model interpolateModel(
            Model model, File projectDir, ModelBuildingRequest config, ModelProblemCollector problems) {
        return interpolateModel(model, projectDir != null ? projectDir.toPath() : null, config, problems);
    }

    @Override
    public Model interpolateModel(
            Model model, Path projectDir, ModelBuildingRequest config, ModelProblemCollector problems) {

      return get(key) != null;
    }

    @Override
    public void clear() {
      FilteredEntryMultimap.this.clear();
    }

    @Override
    @CheckForNull
    public Collection<V> get(@CheckForNull Object key) {
      Collection<V> result = unfiltered.asMap().get(key);
      if (result == null) {
        return null;
      }

   * Returns an arbitrary instance for {@code type}, or {@code null} if no arbitrary instance can be
   * determined.
   */
  public static <T> @Nullable T get(Class<T> type) {
    T defaultValue = DEFAULTS.getInstance(type);
    if (defaultValue != null) {
      return defaultValue;
    }
    Class<? extends T> implementation = getImplementation(type);
    if (implementation != null) {
      return get(implementation);
    }

  public void testContains_nullNotContainedButAllowed() {
    assertFalse("containsKey(null) should return false", getMap().containsKey(null));
  }

  @MapFeature.Require(absent = ALLOWS_NULL_KEY_QUERIES)
  public void testContains_nullNotContainedAndUnsupported() {
    expectNullKeyMissingWhenNullKeysUnsupported("containsKey(null) should return false or throw");
  }

  @MapFeature.Require(ALLOWS_NULL_KEYS)

     *
     * @param pomFile The POM file, must not be {@code null}.
     * @deprecated Use {@link #FileModelSource(Path)} instead.
     */
    @Deprecated
    public FileModelSource(File pomFile) {
        super(pomFile);
    }

    /**
     * Creates a new model source backed by the specified file.
     *
     * @param pomPath The POM file, must not be {@code null}.
     * @since 4.0.0
     */