code: def _true_if_missing_or_collision(spec, spec_names):
      if not spec.name or spec.name in spec_names:
          return True
      spec_names.add(spec.name)
      return False
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import copy
  import functools
  import os
  from typing import Any, Callable, Dict, Tuple, Optional, Text, cast, Sequence
  from absl import logging
  import tensorflow
  import tensorflow_probability
  from tf_agents.policies import tf_policy
  from tf_agents.specs import tensor_spec
  from tf_agents.trajectories import time_step
  from tf_agents.typing import types
  from tf_agents.utils import common
  from tf_agents.utils import nest_utils
  from tensorflow.python.eager import def_function
label_desc: Use image node_id 1 for calling a global function with example usage: _true_if_missing_or_collision(spec, spec_names) and returns: False, True