code: def _set_int_index(self, new_data, idx, neg_indices_left_of_zero):
      actual_idx = idx
      # If index >= 0 -> Ignore lookback buffer.
      # Otherwise, include lookback buffer.
      if actual_idx >= 0 or neg_indices_left_of_zero:
          actual_idx = self.lookback + actual_idx
      # Negative indices mean: Go to left into lookback buffer starting from idx=0.
      # But if we pass the lookback buffer, the index should be invalid and we will
      # have to fill, if required. Invalidate the index by setting it to one larger
      # than max.
      if neg_indices_left_of_zero and actual_idx < 0:
          actual_idx = len(self) + self.lookback
  
      try:
          if self.finalized:
  
              def __set(s, n):
                  if self.space:
                      assert self.space.contains(n), n
                  s[actual_idx] = n
  
              tree.map_structure(__set, self.data, new_data)
          else:
              if self.space:
                  assert self.space.contains(new_data), new_data
              self.data[actual_idx] = new_data
      except IndexError:
          raise IndexError(
              f"Cannot `set()` value at index {idx} (option "
              f"neg_indices_left_of_zero={neg_indices_left_of_zero})! Out of range "
              f"of buffer data."
          )
  
imports: import logging
  from typing import List, Optional, Type, Union
  import gymnasium
  import numpy
  import tree
  from ray.rllib.env.env_context import EnvContext
  from ray.rllib.env.multi_agent_env import MultiAgentEnv
  from ray.rllib.env.wrappers.multi_agent_env_compatibility import MultiAgentEnvCompatibility
  from ray.rllib.utils.error import ERR_MSG_INVALID_ENV_DESCRIPTOR, ERR_MSG_OLD_GYM_API, EnvError
  from ray.rllib.utils.gym import check_old_gym_env
  from ray.rllib.utils.numpy import one_hot, one_hot_multidiscrete
  from ray.rllib.utils.spaces.space_utils import batch, get_dummy_batch_for_space, get_base_struct_from_space
  from ray.util import log_once
  from ray.util.annotations import PublicAPI
label_desc: Use image node_id 17 for calling the BufferWithInfiniteLookback obj's underlying member method code with example usage: obj._set_int_index(new_data, idx, neg_indices_left_of_zero) without return types