*
 * ```java
 * Call call = client.newCall(request);
 * call.enqueue(new Callback() {
 *   public void onResponse(Call call, Response response) throws IOException {
 *     try (ResponseBody responseBody = response.body()) {
 *     ... // Use the response.
 *     }
 *   }
 *
 *   public void onFailure(Call call, IOException e) {
 *   ... // Handle the failure.
 *   }
 * });
 * ```
 *

      val responseBody = response.body.source()
      assertThat(responseBody.readUtf8Line())
        .isEqualTo("response A")
      assertThat(responseBody.readUtf8Line())
        .isEqualTo("response B")
      requestBody.writeUtf8("request C\n")
      requestBody.close()
      assertThat(responseBody.readUtf8Line()).isNull()
    }
    body.awaitSuccess()
  }

   * [closed][ResponseBody] and may be consumed only once.
   *
   * If this is a [cacheResponse], [networkResponse], or [priorResponse], the server's response body
   * is not available, and it is always an error to attempt read its streamed content. Reading from
   * [ResponseBody.source] always throws on such instances.
   *
   * It is safe and supported to call [ResponseBody.contentType] and [ResponseBody.contentLength] on

    val bytes = responseBody.bytes()
    val charStream = responseBody.charStream()
    val string = responseBody.string()
    responseBody.close()
    responseBody = "".toResponseBody("".toMediaType())
    responseBody = "".toResponseBody(null)
    responseBody = ByteString.EMPTY.toResponseBody("".toMediaType())
    responseBody = ByteString.EMPTY.toResponseBody(null)

  }

  private fun peekTrailers(protocol: Protocol) {
    val responseBody = "a".repeat(OKHTTP_CLIENT_WINDOW_SIZE)
    enableProtocol(protocol)

    server.enqueue(
      MockResponse
        .Builder()
        .addHeader("h1", "v1")
        .trailers(headersOf("t1", "v2"))
        .body(protocol, responseBody)
        .build(),
    )

    val call = client.newCall(Request(server.url("/")))

    val response = call.execute()
    cancelLater(call, 500)
    val responseBody = response.body.byteStream()
    val buffer = ByteArray(1024)
    assertFailsWith<IOException> {
      while (responseBody.read(buffer) != -1) {
      }
    }.also { expected ->
      assertEquals(cancelMode == INTERRUPT, Thread.interrupted())
    }
    responseBody.close()

    assertThat(body.string()).isEqualTo("hello")
  }

  @Test
  fun stringClosesUnderlyingSource() {
    val closed = AtomicBoolean()
    val body: ResponseBody =
      object : ResponseBody() {
        override fun contentType(): MediaType? = null

        override fun contentLength(): Long = 5

        override fun source(): BufferedSource {

          },
        )
        throw e
      }

      val tookMs = TimeUnit.NANOSECONDS.toMillis(System.nanoTime() - startNs)

      val responseBody = response.body!!
      val contentLength = responseBody.contentLength()
      val bodySize = if (contentLength != -1L) "$contentLength-byte" else "unknown-length"
      logger.log(
        buildString {
          append("<-- ${response.code}")

| RequestBody.create(String)          | String.toRequestBody()          |
| ResponseBody.create(BufferedSource) | BufferedSource.asResponseBody() |
| ResponseBody.create(ByteArray)      | ByteArray.toResponseBody()      |
| ResponseBody.create(ByteString)     | ByteString.toResponseBody()     |
| ResponseBody.create(String)         | String.toResponseBody()         |


SAM Conversions
---------------

          exceptions.add(e)
        }
      }
    }

    fun takeException(): Exception = exceptions.take()
  }

  companion object {
    fun uppercase(original: ResponseBody): ResponseBody =
      object : ResponseBody() {
        override fun contentType() = original.contentType()

        override fun contentLength() = original.contentLength()