: ctx_(ctx) {
  // Initialize the three sub-components.
  sub_components_[0] = std::make_unique<PreCalibrationComponent>(ctx_);
  sub_components_[1] = std::make_unique<CalibrationComponent>(
      ctx_, py_function_library, src_saved_model_path,
      std::move(function_aliases), std::move(tags),
      std::move(signature_def_map), std::move(signature_keys));
  sub_components_[2] = std::make_unique<PostCalibrationComponent>(ctx_);
}

  // Constructs `StaticRangePtqComponent` by creating three sub-components:
  // `PreCalibrationComponent`, `CalibrationComponent`, and
  // `PostCalibrationComponent`. These are stored in `sub_components_` in
  // sequence. All arguments except `ctx` is used to initialize
  // `CalibrationComponent`. For detailed explanation of each argument, see the
  // comment of `CalibrationComponent`'s constructor.

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