@Override
  public final String toString() {
    byte[] bytes = getBytesInternal();
    StringBuilder sb = new StringBuilder(2 * bytes.length);
    for (byte b : bytes) {
      sb.append(hexDigits[(b >> 4) & 0xf]).append(hexDigits[b & 0xf]);
    }
    return sb.toString();
  }

  private static final char[] hexDigits = "0123456789abcdef".toCharArray();

    private static String printHexBinary(byte[] data) {
        StringBuilder r = new StringBuilder(data.length * 2);
        for (byte b : data) {
            r.append(HEX_CODE[(b >> 4) & 0xF]);
            r.append(HEX_CODE[(b & 0xF)]);
        }
        return r.toString();
    }

      encodings[ 0x7] = encoding // Bell
      encodings['\b'.code] = encoding // Backspace
      encodings[ 0xb] = encoding // Vertical Tab
      encodings[ 0xe] = encoding // Shift Out
      encodings[ 0xf] = encoding // Shift In
      encodings[ 0x10] = encoding // Data Link Escape
      encodings[ 0x11] = encoding // Device Control 1 (oft. XON)
      encodings[ 0x12] = encoding // Device Control 2

    hpackWriter!!.resizeHeaderTable(2048)
    hpackWriter!!.writeHeaders(listOf(Header("foo", "bar")))
    assertBytes(
      // Dynamic table size update (size = 2048).
      0x3F,
      0xE1,
      0xF,
      0x40,
      3,
      'f'.code,
      'o'.code,
      'o'.code,
      3,
      'b'.code,
      'a'.code,
      'r'.code,
    )
    hpackWriter!!.resizeHeaderTable(8192)

0x31, 0x33, 0x32, 0x39, 0x31, 0x2b, 0x30, 0x38, 0x3a, 0x30, 0x30, 0xa1, 0x76, 0x0, 0xc4, 0x24, 0x95, 0xc4, 0x10, 0xdb, 0xaf, 0x9a, 0xe8, 0xda, 0xe0, 0x40, 0xa6, 0x80, 0xf2, 0x1c, 0x39, 0xe8, 0x7, 0x38, 0x2c, 0xd3, 0x16, 0xb2, 0x7f, 0xfe, 0x45, 0x1c, 0xf, 0x98, 0xc4, 0x4, 0xea, 0x49, 0x78, 0x27, 0x1, 0x6, 0xc5, 0x1, 0x4b, 0x82, 0xa4, 0x54, 0x79, 0x70, 0x65, 0x1, 0xa5, 0x56, 0x32, 0x4f, 0x62, 0x6a, 0xde, 0x0, 0x11, 0xa2, 0x49, 0x44, 0xc4, 0x10, 0xdb, 0xaf, 0x9a, 0xe8, 0xda, 0xe0, 0x40, 0xa6, 0x80, 0xf2,...