an class="p">):</span>
    <span class="sd">&quot;&quot;&quot; Combination layer to merge the representation of two sequence</span>

<span class="sd">    Args:</span>
<span class="sd">        layer_conf (CombinationConf): configuration of a layer</span>
<span class="sd">    &quot;&quot;&quot;</span>
    <span class="k">def</span> <span class="nf">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">layer_conf</span><span class="p">):</span>
        <spa