div>
<nav class="contents local" id="contents">
<ul class="simple">
<li><p><a class="reference internal" href="#public-predicates" id="id1">Public predicates</a></p></li>
<li><p><a class="reference internal" href="#protected-predicates" id="id2">Protected predicates</a></p></li>
<li><p><a class="reference internal" href="#private-predicates" id="id3">Private predicates</a></p></li>
<li><p><a class="reference internal" href="#operators" id="id4">Operators</a></p></li>
</ul>
</nav>
<section id="public-predica