>This procedure acts, with await-task-in-event-loop!, as a form of
channel through which two different event loops may communicate.  It
also offers a means by which a master event loop (the waiter or
default event loop) may allocate work to worker event loops for
execution.
</p>
<p>Depending on the circumstances, it may be desirable to provide
throttling arguments when constructing the &rsquo;worker&rsquo; event loop, in
order to enable backpressure to be supplied if the &rsquo;worker&rsquo; event loop
beco