value: Any,
  ) = apply {
    removeHeader(name)
    addHeader(name, value)
  }

  fun removeHeader(name: String) =
    apply {
      headersBuilder.removeAll(name)
    }

  fun getBody(): Buffer? = body?.clone()

  fun setBody(body: Buffer) =
    apply {
      setHeader("Content-Length", body.size)
      this.body = body.clone() // Defensive copy.
    }

            final String schedulerId = getSchedulerIds(namePrefix).get(0);
            final Response response = checkMethodBase(requestBody).post("/api/admin/scheduler/" + schedulerId + "/start");
            if (response.getBody().jsonPath().getInt("response.status") == 0) {
                logger.info("Start scheduler \"{}\"", schedulerId);
                return;
            }
            ThreadUtil.sleep(1000L);
        }

  }

  @Test
  fun setBodyAdjustsHeaders() {
    val response = MockResponse().setBody("ABC")
    assertThat(headersToList(response)).containsExactly("Content-Length: 3")
    assertThat(response.getBody()!!.readUtf8()).isEqualTo("ABC")
  }

  @Test
  fun mockResponseAddHeader() {
    val response =
      MockResponse()
        .clearHeaders()
        .addHeader("Cookie: s=square")

pkg net/http, type PushOptions struct
pkg net/http, type PushOptions struct, Header Header
pkg net/http, type PushOptions struct, Method string
pkg net/http, type Request struct, GetBody func() (io.ReadCloser, error)
pkg net/http, type Server struct, IdleTimeout time.Duration
pkg net/http, type Server struct, ReadHeaderTimeout time.Duration
pkg net/http, type Transport struct, ProxyConnectHeader Header

    mockResponse = mockResponse.setHeader("", Any())
    mockResponse.headers = headersOf()
    mockResponse.trailers = headersOf()
    mockResponse = mockResponse.removeHeader("")
    var body: Buffer? = mockResponse.getBody()
    mockResponse = mockResponse.setBody(Buffer())
    mockResponse = mockResponse.setChunkedBody(Buffer(), 0)
    mockResponse = mockResponse.setChunkedBody("", 0)