 class=Prototype>
      <tr><td><table border=0 cellspacing=0 cellpadding=0><tr>
      <td class=PBeforeParameters colspan=4>pure virtual function bit try_get(</td>      </tr><tr><td>&nbsp;&nbsp;&nbsp;</td>      <td class=PTypePrefix nowrap>output&nbsp;</td>
      <td class=PType nowrap>T&nbsp;</td>
      <td class=PParameter nowrap width=100%>value</td>
    </tr>
    <tr>
      <td class=PAfterParameters colspan=4>)</td></tr>
      </table></td></tr>
    </table></blockquote>
Attempts to retrieve the value