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<p>
Returns the index of the specified item or MAX_UNSIGNED_LONG if not found <dl compact><dt><b>Parameters:</b></dt><dd>
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    <tr><td valign="top"></td><td valign="top"><em>input</em>&nbsp;</td><td>The element to check for </td></tr>
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<dl compact><dt><b>Returns:</b></dt><dd>The index or position of <em>input</em> in the list. If input is not 