a></li>
</ul></li>
<li class="chapter" data-level="25" data-path="250_factor.html"><a href="250_factor.html"><i class="fa fa-check"></i><b>25</b> factor</a></li>
<li class="chapter" data-level="26" data-path="260_error.html"><a href="260_error.html"><i class="fa fa-check"></i><b>26</b> Error handling</a></li>
<li class="chapter" data-level="27" data-path="270_cancellation.html"><a href="270_cancellation.html"><i class="fa fa-check"></i><b>27</b> Cancel handling</a></li>
<li class="chapter" data-level="28" d