20"><a href="200_robject.html#cb70-20"></a>        Rcout &lt;&lt; <span class="st">&quot;S4</span><span class="sc">\n</span><span class="st">&quot;</span>;</span>
<span id="cb70-21"><a href="200_robject.html#cb70-21"></a>    <span class="cf">else</span> <span class="cf">if</span>(x.isNULL())</span>
<span id="cb70-22"><a href="200_robject.html#cb70-22"></a>        Rcout &lt;&lt; <span class="st">&quot;NULL</span><span class="sc">\n</span><span class="st">&quot;</span>;</span>
<span id="cb70-23"><a href="200_