code: def _check_tree_structure(parent, leaf):
      if parent == leaf:
          raise NotImplementedError(
              "Expected tree-structured plate nesting, but found "
              "dependencies on independent plates [{}]. "
              "Try converting one of the vectorized plates to a sequential plate (but beware "
              "exponential cost in the size of the sequence)".format(
                  ", ".join(getattr(f, "name", str(f)) for f in leaf)
              )
          )
  
imports: import itertools
  import warnings
  from collections import OrderedDict, defaultdict
  import opt_einsum
  import torch
  from opt_einsum import shared_intermediates
  from pyro.ops.rings import BACKEND_TO_RING, LogRing
  from pyro.util import ignore_jit_warnings
label_desc: Use image node_id 2 for calling a global function with example usage: _check_tree_structure(parent, leaf) without return types