   <h1>Source code for straph.etf.EulerTourTree</h1>
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<span></span><span class="c1"># Copyright (C) 2017-2020 Léo Rannou - Sorbonne Université/LIP6 - Thales</span>
<span class="c1">#</span>
<span class="c1"># Licensed under the Apache License, Version 2.0 (the &quot;License&quot;);</span>
<span class="c1"># you may not use this file except in compliance with the License.</span>
<span class="c1"># You may obtain a copy of the License at</span>
<span class="c1">#<