code: def source(func):
      s = "File: %s\n\n" % inspect.getsourcefile(func)
      s = s + inspect.getsource(func)
      return s
  
imports: from __future__ import annotations
  from warnings import warn
  import inspect
  from .conflict import ordering, ambiguities, super_signature, AmbiguityWarning
  from .utils import expand_tuples
  import itertools
label_desc: Use image node_id 5 for calling a global function with example usage: source(func) and returns: s