a href="#timeout_period_to_milliseconds-1">timeout_period_to_milliseconds/1</a></td><td></td></tr>
</table>

<h2><a name="functions">Function Details</a></h2>

<h3 class="function"><a name="function_optional-2">function_optional/2</a></h3>
<div class="spec">
<p><tt>function_optional(Function::undefined | function() | {module(), atom()} | {{module(), atom()}} | {{module(), atom(), list()}}, Arity::non_neg_integer()) -&gt; undefined | function()</tt><br></p>
<p> </p>
</div>

<h3 class="function"><a name="func