 class="computeroutput">true</code>, then the attribute is added and the first member points to the attribute. Otherwise the attribute was not added and the first member points to the attribute that prevents addition. </p></td>
</tr>
</tbody>
</table></div>
</li>
<li class="listitem">
<pre class="literallayout"><span class="keyword">void</span> <a name="idm46093049597744-bb"></a><span class="identifier">remove_attribute</span><span class="special">(</span><span class="identifier">attribute_set</span><span c