/*isolate_session_state=*/false,
                                     /*init_timeout_in_ms=*/0);
  TFE_Context* ctx_1 = CreateContext(serialized_server_def_1,
                                     /*isolate_session_state=*/false,
                                     /*init_timeout_in_ms=*/0);

  // Remote device on `worker1`.
  const char remote_device[] = "/job:localhost/replica:0/task:1/device:CPU:0";