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<td><p><span class="term"><em class="parameter"><code>res_class</code></em> :</span></p></td>
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<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
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<em class="parameter"><code>res_class</code></em>, or <a href="/gnome/usr/share/gtk-doc/html/liboil/liboil-liboiljunk.html#NULL--CAPS"><code class="literal">NULL</code></a> if there is no <a class="link" href="WnckClassGroup.html" title="WnckClassGroup"><span class="type">WnckClassGroup</span></a> with the specified
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<em class="parameter"><code>res_class</code></em>. The returned <a class="link" href="WnckClassGroup.html" title="WnckClassGroup"><span class="type">WnckClassGroup</span></a> is owned by libwnck and must not be
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referenced or unreferenced. <span class="annotation">[<a href="http://foldoc.org/transfer%20none"><span class="acronym">transfer none</span></a>]</span>