This method implements some action on state changed. i.e.: on Complete Workflow user can implement clear a cache or log some info

This method implements some action on state changed. i.e.: on Complete Workflow user can implement the publish of a pending content version.

The method gets the action message that will be sent to notify the users depending on the type of action i.e.: with action type Complete Workflow the action message represents the notification sent to the user that started the workflow