</ul>
            </li>
            <li class="nav-item" data-level="4"><a href="#savingrestoring-the-factory" class="nav-link">Saving/restoring the factory</a>
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              </ul>
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              </ul>
            </li>
            <li class="nav-item" data-level="3"><a href="#typical-code-example" class="nav-link">Typical code example</a>
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