MediaType mediaType = addKnownType(new MediaType(type, subtype, UTF_8_CONSTANT_PARAMETERS));
    mediaType.parsedCharset = Optional.of(UTF_8);
    return mediaType;
  }

  @CanIgnoreReturnValue
  private static MediaType addKnownType(MediaType mediaType) {
    knownTypes.put(mediaType, mediaType);
    return mediaType;
  }

  /*
   * The following constants are grouped by their type and ordered alphabetically by the constant

   * Content-Type header.
   */
  override fun toString(): String = mediaType

  override fun equals(other: Any?): Boolean = other is MediaType && other.mediaType == mediaType

  override fun hashCode(): Int = mediaType.hashCode()

  companion object {
    private const val TOKEN = "([a-zA-Z0-9-!#$%&'*+.^_`{|}~]+)"
    private const val QUOTED = "\"([^\"]*)\""

    assertEquals("2", mediaType.parameter("b"))
    assertEquals("3", mediaType.parameter("c"))
    assertEquals("utf-8", mediaType.parameter("CHARSET"))
    assertEquals("1", mediaType.parameter("A"))
    assertEquals("2", mediaType.parameter("B"))
    assertEquals("3", mediaType.parameter("C"))
  }

  @Test fun testCharsetAndQuoting() {

     * @param mediaType the media type for the content builder
     * @return an OutputStream containing the built content, or an empty ByteArrayOutputStream if an error occurs
     */
    public static OutputStream getXContentBuilderOutputStream(final XContentBuilderCallback func, final MediaType mediaType) {
        try (final XContentBuilder builder = func.apply(mediaType.contentBuilder(), ToXContent.EMPTY_PARAMS)) {

    withLocale(Locale("en", "US")) {
      val mediaType = parse("IMAGE/JPEG")
      assertEquals("image", mediaType.type)
      assertEquals("jpeg", mediaType.subtype)
    }
  }

  @Test fun testTurkishDotlessIWithTrTr() {
    withLocale(Locale("tr", "TR")) {
      val mediaType = parse("IMAGE/JPEG")
      assertEquals("image", mediaType.type)
      assertEquals("jpeg", mediaType.subtype)
    }
  }

	public static final fun create (Lokhttp3/MediaType;Lokio/ByteString;)Lokhttp3/RequestBody;
	public static final fun create (Lokhttp3/MediaType;[B)Lokhttp3/RequestBody;
	public static final fun create (Lokhttp3/MediaType;[BI)Lokhttp3/RequestBody;
	public static final fun create (Lokhttp3/MediaType;[BII)Lokhttp3/RequestBody;

  companion object {
    @JvmOverloads
    fun body(
      hex: String,
      charset: String? = null,
    ): ResponseBody {
      val mediaType = if (charset == null) null else "any/thing; charset=$charset".toMediaType()
      return hex.decodeHex().toResponseBody(mediaType)
    }

    fun exhaust(reader: Reader): String {
      val builder = StringBuilder()
      val buf = CharArray(10)
      var read: Int

        MediaType.parse("text/plain; a=1; a=2").withParameter("a", "3"));
    assertEquals(
        MediaType.parse("text/plain; a=1; a=2; b=3"),
        MediaType.parse("text/plain; a=1; a=2").withParameter("b", "3"));
  }

  public void testWithParameter_invalidAttribute() {
    MediaType mediaType = MediaType.parse("text/plain");

    @JvmName("create")
    fun String.toRequestBody(contentType: MediaType? = null): RequestBody {
      val (charset, finalContentType) = contentType.chooseCharset()
      val bytes = toByteArray(charset)
      return bytes.toRequestBody(finalContentType, 0, bytes.size)
    }

    @JvmStatic
    @JvmName("create")
    fun ByteString.toRequestBody(contentType: MediaType? = null): RequestBody =
      object : RequestBody() {

    cipherSuitesAsString.intersect(socketEnabledCipherSuites, CipherSuite.ORDER_BY_NAME)
  } else {
    socketEnabledCipherSuites
  }

internal fun MediaType?.chooseCharset(): Pair<Charset, MediaType?> {
  var charset: Charset = Charsets.UTF_8
  var finalContentType: MediaType? = this
  if (this != null) {
    val resolvedCharset = this.charset()
    if (resolvedCharset == null) {
      charset = Charsets.UTF_8