th working SFINAE.
          </li></ul></div>
<p>
        <span class="bold"><strong>Known issues:</strong></span>
      </p>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
            This trait cannot detect whether binary <code class="computeroutput"><span class="keyword">operator</span><span class="special">/=</span></code> is public or not: if <code class="computeroutput"><span class="keyword">operator</span><span class="special">/=</span></cod