/**
  * @return WorkflowId
  */
 public function workflowId()
 {
     if (is_null($this->workflowId)) {
         $this->workflowId = WorkflowId::fromString($this->aggregateId());
     }
     return $this->workflowId;
 }
 /**
  * @return WorkflowId
  */
 public function workflowId()
 {
     return WorkflowId::fromString($this->payload['workflow_id']);
 }
 /**
  * @return WorkflowId
  */
 public function workflowId()
 {
     return WorkflowId::fromString($this->aggregateId());
 }