pid monitors to reduce the messages the cpg
   scope process needs to manage.
<h2><a name="types">Data Types</a></h2>

<h3 class="typedecl"><a name="type-process">process()</a></h3>
<p><tt>process() = pid()</tt></p>


<h2><a name="index">Function Index</a></h2>
<table width="100%" border="1" cellspacing="0" cellpadding="2" summary="function index"><tr><td valign="top"><a href="#add-2">add/2</a></td><td></td></tr>
<tr><td valign="top"><a href="#code_change-3">code_change/3</a></td><td></td></tr>
<tr><td vali