this object as <code>int</code>. See the <a href="https://cran.r-project.org/doc/manuals/r-release/R-ints.html#SEXPTYPEs">R internals</a> for a list of all <code>SEXPTYPE</code> defined in R.</p>
</div>
<div id="isobject" class="section level3" number="18.1.9">
<h3><span class="header-section-number">18.1.9</span> isObject()</h3>
<p>Returns <code>true</code> if this object has a “class” attribute.</p>
</div>
<div id="iss4" class="section level3" number="18.1.10">
<h3><span class="header-section-number">