code: def _arg_name(node):
      if node is None:
          return None
      if isinstance(node, gast.Name):
          return node.id
      assert isinstance(node, str)
      return node
  
imports: import ast
  import inspect
  import linecache
  import re
  import sys
  import textwrap
  import tokenize
  import astunparse
  import gast
  import six
  from nvidia.dali._autograph.pyct import errors
  from nvidia.dali._autograph.pyct import inspect_utils
label_desc: Use image node_id 5 for calling a global function with example usage: _arg_name(node) and returns: node, None, node