 subsequent
events are unsynchronized until another datum exchange is arranged.
This means that where two &quot;pseudo-threads&quot; share access to objects
other than the datum exchanged and they might be mutated, one
&quot;pseudo-thread&quot; is guaranteed to see a value of the unexchanged shared
objects which is not earlier than the value they held at the moment of
datum exchange, but it may or may not see a later value.
</p>
<p>Here is an example of the use of a meeting object:
</p>
<div class="example"