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<td><p><span class="term"><code class="computeroutput">f</code></span></p></td>
<td><p>New failure handler functor to set.</p></td>
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<td><p><span class="term">Returns:</span></p></td>
<td><p>Same failure handler functor <code class="computeroutput">f</code> passed as parameter (e.g., fr concatenating function calls).</p></td>
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