ss <code>merMod</code>, i.e.,
    as resulting from <code><a href="lmer.html">lmer</a>()</code>, or <code><a href="glmer.html">glmer</a>()</code>,
    etc.</p></dd>

  <dt id="arg-x">x<a class="anchor" aria-label="anchor" href="#arg-x"></a></dt>
<dd><p>an <span style="R">R</span> object of class <code>merMod</code> or <code>summary.merMod</code>,
    respectively, the latter resulting from <code>summary(&lt;merMod&gt;)</code>.</p></dd>

  <dt id="arg-fit">fit<a class="anchor" aria-label="anchor" href="#arg-