intended to be called within a waitable procedure
invoked by a-sync (which supplies the &rsquo;await&rsquo; and &rsquo;resume&rsquo; arguments).
</p>
<p>Calling this procedure is equivalent to calling await-glib-timeout
with a &rsquo;proc&rsquo; argument comprising a lambda expression that does
nothing.
</p>
<p>This procedure must (like the a-sync procedure) be called in the same
thread as that in which the default glib main loop runs.
</p>
<p>This procedure should not throw any exceptions unless memory is
