df9"><td class="mdescLeft">&#160;</td><td class="mdescRight">Equivalent to <code>is_a</code>; provided for consistency with the rules of the English language. <br /></td></tr>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<div class="textblock"><p>Forward declares <code><a class="el" href="group__group-core.html#ga38cf78e1e3e262f7f1c71ddd9ca70cd9" tit