 rowspan="2" align="center" valign="top" width="25"><img alt="[Note]" src="../../../../../../doc/src/images/note.png"></td>
<th align="left">Note</th>
</tr>
<tr><td align="left" valign="top"><p>
              All sink frontends assume it is safe to call exception handlers from
              multiple threads concurrently. This is fine with the library-provided
              exception dispatchers.
            </p></td></tr>
</table></div>
</div>
</div>
<div class="section">
<div class="titlepage"><div><div><h