between children and parents.</p><p>The children send &quot;Ready&quot; or &quot;I'm working on task &lt;some string&gt;&quot; messages that are used to respectively send them more tasks (&quot;Do x&quot;) or update the task bar with the description provided by the child.</p><p>See also <code>ProcessPoolState</code>.</p></aside><dl><dt class="spec type" id="type-t"><a href="#type-t" class="anchor"></a><code><span class="keyword">type</span> <span>(_, _, _) t</span></code></dt><dd><p>A <code>('work, 'final) 