">retractall</span>(bar(<span class="nv">_</span>)),
    ...
</pre></div>
</div>
<p>Another example, using the extended notation that allows us to define
predicate aliases:</p>
<div class="highlight-logtalk notranslate"><div class="highlight"><pre><span></span><span class="p">:- </span><span class="k">use_module</span>(ugraphs, [transpose_ugraph<span class="o">/</span><span class="m">2</span> <span class="o">as</span> transpose<span class="o">/</span><span class="m">2</span>]).

convert_graph <span class="o