@Throws(IOException::class)
          override fun writeTo(sink: BufferedSink) {
            val forwardingSink = object : ForwardingSink(sink) {
              private var totalBytesWritten: Long = 0
              private var completed = false

              override fun write(source: Buffer, byteCount: Long) {
                super.write(source, byteCount)
                totalBytesWritten += byteCount

        Request
          .Builder()
          .url(server.url("/"))
          .post(
            object : RequestBody() {
              override fun contentType() = null

              override fun writeTo(sink: BufferedSink) {
                for (i in 0..9) {
                  sink.writeByte(0)
                  sink.flush()
                  sleep(100)
                }

            override fun writeTo(sink: BufferedSink) {
              val a1024x1024 = "a".repeat(1024 * 1024)
              repeat(100) {
                sink.writeUtf8(a1024x1024)
              }
            }
          },
        ).build()
    val buffer = Buffer()
    multipartBody.writeTo(buffer)

    val multipartReader = MultipartReader(buffer, "foo")

class PostStreaming {
  private val client = OkHttpClient()

  fun run() {
    val requestBody =
      object : RequestBody() {
        override fun contentType() = MEDIA_TYPE_MARKDOWN

        override fun writeTo(sink: BufferedSink) {
          sink.writeUtf8("Numbers\n")
          sink.writeUtf8("-------\n")
          for (i in 2..997) {
            sink.writeUtf8(String.format(" * $i = ${factor(i)}\n"))
          }
        }

  }

  /**
   * Writes this {@code BloomFilter} to an output stream, with a custom format (not Java
   * serialization). This has been measured to save at least 400 bytes compared to regular
   * serialization.
   *
   * <p>Use {@linkplain #readFrom(InputStream, Funnel)} to reconstruct the written BloomFilter.
   */
  public void writeTo(OutputStream out) throws IOException {
    // Serial form:

		r := NewReader(rw)
		if _, err := r.WriteTo(rw); err != rw.expected {
			t.Errorf("r.WriteTo(errorWriterToTests[%d]) = _, %v, want _,%v", i, err, rw.expected)
		}
	}
}

func TestWriterReadFrom(t *testing.T) {
	ws := []func(io.Writer) io.Writer{
		func(w io.Writer) io.Writer { return onlyWriter{w} },
		func(w io.Writer) io.Writer { return w },
	}

	rs := []func(io.Reader) io.Reader{

    val encodedValue: String = formBody.encodedValue(0)
    val value: String = formBody.value(0)
    val contentType: MediaType = formBody.contentType()
    val contentLength: Long = formBody.contentLength()
    formBody.writeTo(Buffer())
    val requestBody: RequestBody = formBody
  }

  @Test
  fun formBodyBuilder() {
    var builder: FormBody.Builder = FormBody.Builder()
    builder = FormBody.Builder(Charsets.UTF_8)

      Main().apply {
        parse(args.toList())
      }

    private fun bodyAsString(body: RequestBody?): String =
      try {
        val buffer = Buffer()
        body!!.writeTo(buffer)
        buffer.readString(body.contentType()!!.charset()!!)
      } catch (e: IOException) {
        throw RuntimeException(e)
      }
  }

      @Override public long contentLength() {
        return -1; // We don't know the compressed length in advance!
      }

      @Override public void writeTo(BufferedSink sink) throws IOException {
        BufferedSink gzipSink = Okio.buffer(new GzipSink(sink));
        body.writeTo(gzipSink);
        gzipSink.close();
      }
    };
  }
}
```

### Rewriting Responses

				}
			case testWriteTo:
				f := &testFile{ops: tf.ops}
				got, err := fr.WriteTo(f)
				if _, ok := err.(testError); ok {
					t.Errorf("test %d.%d, WriteTo(): %v", i, j, err)
				} else if got != tf.wantCnt || err != tf.wantErr {
					t.Errorf("test %d.%d, WriteTo() = (%d, %v), want (%d, %v)", i, j, got, err, tf.wantCnt, tf.wantErr)
				}
				if len(f.ops) > 0 {