pan> <span class="nf">eq_in</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">member</span><span class="p">):</span>
    <span class="sd">&quot;&quot;&quot; Determines whether argument is equivalent to any of the constituent members.</span>

<span class="sd">    </span>
<span class="sd">    Args:</span>
<span class="sd">      member: (Membered) object to be checked.</span>

<span class="sd">    Returns:</span>
<span class="sd">      True when member is equiva