mmunicate with an event-loop, use await-task-in-thread!,
await-task-in-event-loop!, await-task-in-thread-pool!,
await-generator-in-thread!, await-generator-in-event-loop! or
await-generator-in-thread-pool!.
</p>
<p>This procedure always returns the datum value supplied by meeting-send
unless meeting-close has been applied to a meeting object, in which
case &rsquo;stop-iteration is returned.  Note that if multiple meeting
objects are passed to this procedure and one of them is then closed,
this procedure wil