I have tried to use the CMMN modeler to add Correlation Paramters to a generic event listener.
When I export the cmm.xml file, the file does not contain the mark up for the Correlation Parameters.
With the BPMN modeler I can see the Correlation Paramters as expected in the bpmn.xml as follows:
<flowable:eventCorrelationParameter xmlns:flowable=“http://flowable.org/bpmn” name=“customerId” type=“string” value=“one”></flowable:eventCorrelationParameter>
Pulled docker image. Running latest version of flowable/all-in-one:latest