interface in org.activiti.engine.delegate.event">ActivitiEvent</a></code></dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the id of the process definition this event is associated with. Returns null, if the event
 was not dispatched from within an active execution.</dd>
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<h4>setProcessDefinitionId</h4>
<pre>public&nbsp;void&nbsp;setProcessDefinitionId(<a href="http:/