```kotlin
    val response: Response = call.execute()
    val multipartReader = MultipartReader(response.body!!)

    multipartReader.use {
      while (true) {
        val part = multipartReader.nextPart() ?: break
        process(part.headers, part.body)
      }
    }
    ```

 *  New: `MediaType.parameter()` gets a parameter like `boundary` from a media type like
    `multipart/mixed; boundary="abc"`.

				t.Errorf("range=%q Content-Length = %d; want %d", rt.r, g, w)
				continue
			}
			mr := multipart.NewReader(bytes.NewReader(body), params["boundary"])
			for ri, rng := range rt.ranges {
				part, err := mr.NextPart()
				if err != nil {
					t.Errorf("range=%q, reading part index %d: %v", rt.r, ri, err)
					continue Cases
				}
				wantContentRange = fmt.Sprintf("bytes %d-%d/%d", rng.start, rng.end-1, testFileLen)

		maxMemoryBytes := 2 * int64(10<<20)
		maxMemoryBytes -= int64(len(name))
		maxMemoryBytes -= mapEntryOverhead
		if maxMemoryBytes < 0 {
			// We can't actually take this path, since nextPart would already have
			// rejected the MIME headers for being too large. Check anyway.
			apiErr := errorCodes.ToAPIErr(ErrMalformedPOSTRequest)

	public fun <init> (Lokhttp3/ResponseBody;)V
	public fun <init> (Lokio/BufferedSource;Ljava/lang/String;)V
	public final fun boundary ()Ljava/lang/String;
	public fun close ()V
	public final fun nextPart ()Lokhttp3/MultipartReader$Part;
}

public final class okhttp3/MultipartReader$Part : java/io/Closeable {
	public fun <init> (Lokhttp3/Headers;Lokio/BufferedSource;)V
	public final fun body ()Lokio/BufferedSource;

		{"(*Form).RemoveAll", Method, 0},
		{"(*Part).Close", Method, 0},
		{"(*Part).FileName", Method, 0},
		{"(*Part).FormName", Method, 0},
		{"(*Part).Read", Method, 0},
		{"(*Reader).NextPart", Method, 0},
		{"(*Reader).NextRawPart", Method, 14},
		{"(*Reader).ReadForm", Method, 0},
		{"(*Writer).Boundary", Method, 0},
		{"(*Writer).Close", Method, 0},
		{"(*Writer).CreateFormField", Method, 0},