code: def nested_flatten(t):
      """
      Turn nested list/tuple/dict into a flat iterator.
      """
      if isinstance(t, (list, tuple)):
          for x in t:
              yield from nested_flatten(x)
      elif isinstance(t, dict):
          for k, v in sorted(t.items()):
              yield from nested_flatten(v)
      else:
          yield t
  
label_desc: Use image node_id 2 for calling a global function with example usage: nested_flatten(t) without return types