Interceptor { chain: Interceptor.Chain? ->
            Response.Builder()
              .request(chain!!.request())
              .protocol(Protocol.HTTP_1_1)
              .code(200)
              .message("OK")
              .body("a".toResponseBody(null))
              .build()
          },
        )
        .build()
    val call = client.newCall(Request.Builder().url(server.url("/")).build())