return nullptr;
}

void TF_GraphToGraphDef(TF_Graph* graph, TF_Buffer* output_graph_def,
                        TF_Status* status) {
  GraphDef def;
  {
    mutex_lock l(graph->mu);
    graph->graph.ToGraphDef(&def);
  }
  status->status = MessageToBuffer(def, output_graph_def);
}

void TF_GraphGetOpDef(TF_Graph* graph, const char* op_name,
                      TF_Buffer* output_op_def, TF_Status* status) {

      Request(
        url = server.url("/"),
        body = "def".toRequestBody("text/plain".toMediaType()),
      )
    executeSynchronously(request)
      .assertCode(200)
      .assertBody("abc")
    val recordedRequest = server.takeRequest()
    assertThat(recordedRequest.method).isEqualTo("POST")
    assertThat(recordedRequest.body.readUtf8()).isEqualTo("def")
    assertThat(recordedRequest.headers["Content-Length"]).isEqualTo("3")

            )
        return self.openapi_schema

    def setup(self) -> None:
        if self.openapi_url:
            urls = (server_data.get("url") for server_data in self.servers)
            server_urls = {url for url in urls if url}

            async def openapi(req: Request) -> JSONResponse:
                root_path = req.scope.get("root_path", "").rstrip("/")

    server.useHttps(handshakeCertificates.sslSocketFactory())
    server.enqueue(MockResponse(body = "ABC"))
    server.enqueue(MockResponse(body = "DEF"))
    server.enqueue(MockResponse(body = "GHI"))
    assertContent("ABC", getResponse(newRequest("/")))
    assertContent("DEF", getResponse(newRequest("/")))
    assertContent("GHI", getResponse(newRequest("/")))
    assertThat(hostnameVerifier.calls)