code: public function eventWebhook($process_id, $event_id, $any_variable = null)
      {
          list($response) = $this->eventWebhookWithHttpInfo($process_id, $event_id, $any_variable);
          return $response;
      }
docs: Operation eventWebhook
  
  
  
  @param string $process_id Process ID related to the event (required)
  @param string $event_id ID of the event to trigger (required)
  @param string $any_variable Any POST or GET variable will be passed to the newly created DataModel (optional)
  @return string
  @throws \ProcessMaker\PMIO\ApiException on non-2xx response