code: def call_r(func_name, args):
      R_FUNCTIONS[func_name](*args)
  
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 1 for calling a global function with example usage: call_r(func_name, args) without return types