code: def children(x):
      if is_atom(x):
          return ()
      raise ValueError(type(x))
  
imports: import functools
  import os
  import re
  import types
  import warnings
  from collections import OrderedDict, defaultdict, deque
  from functools import singledispatch
  import numpy
  from funsor.domains import ArrayType
  from funsor.ops import Op, is_numeric_array
  from funsor.util import is_jax_compiled_function, is_nn_module
  from .None import instrument
label_desc: Use image node_id 5 for calling a global function with example usage: children(x) and returns: 