">,</span> <span class="n">nprimary</span><span class="p">,</span> <span class="n">utility</span>
    

    <span class="k">def</span> <span class="nf">_search</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">collections</span><span class="p">):</span>

<span class="w">        </span><span class="sd">&quot;&quot;&quot;</span>
<span class="sd">        Search for frequent patterns in the given collections.</span>

<span class="sd">        :param collections: l