code: def is_builtin_function(func_name):
      """Test if a function is a builtin (like len(), map(), ...)."""
      return func_name in MODULES["builtins"]
  
imports: from pythran.passmanager import Transformation
  from pythran.tables import MODULES, pythran_ward
  from pythran.syntax import PythranSyntaxError
  import gast
  import logging
  import os
label_desc: Use image node_id 5 for calling a global function with example usage: is_builtin_function(func_name) and returns: unknown