ar> and <var>D<sub>2</sub></var> shall belong to different fluid classes.  This behaviour is implemented by the generic function <code class="api-name">make-object</code>.</p>

  <div class="api_docstring">
  <p class="api">
[generic function]
<code class='api'><span class='api-name'>make-object</span>
<span class='arg-name'>bindings</span>
<span class='arg-name'>class</span>
<span class='lambda-kwd'>&amp;optional</span>
<span class='arg-name'>superclasses</span>
</code>
  </p>
<p class='docstring'>
If <spa