code: def resource_name_for_dag(root_dag_id: str) -> str:
      """Return the resource name for a DAG id.
  
      Note that since a sub-DAG should follow the permission of its
      parent DAG, you should pass ``DagModel.root_dag_id`` to this function,
      for a subdag. A normal dag should pass the ``DagModel.dag_id``.
      """
      if root_dag_id == RESOURCE_DAG:
          return root_dag_id
      if root_dag_id.startswith(RESOURCE_DAG_PREFIX):
          return root_dag_id
      return f"{RESOURCE_DAG_PREFIX}{root_dag_id}"
  
label_desc: Use image node_id 1 for calling a global function with example usage: resource_name_for_dag(root_dag_id) and returns: RESOURCE_DAG_PREFIX, root_dag_id, root_dag_id, root_dag_id