code: def container_image():
      return R_CONTAINER_IMAGE
  
file_path: metaflow/metaflow/R.py
imports: import os
  import sys
  from importlib import util, machinery
  from tempfile import NamedTemporaryFile
  from .util import to_bytes
label_desc: Use image node_id 6 for calling a global function with example usage: container_image() and returns: R_CONTAINER_IMAGE