acquiredObjectName ? "$acquiredObjectName ($workflowExecutionId)" : workflowExecutionId

this expression is used to determine the name that is displayed in the list view of the workflow executions.
    If the execution is produced by a workflow job, $acquiredObjectName has a value,
    otherwise the workflowId is displayed.
    (Note: we need to use the workflowExecutionId because the workflowId of the workflow job
     is not uniquely defined, the workflowId of the workflow execution is unique.)