code: def _is_fp8_tensor(tensor: torch.Tensor) -> bool:
      return HAVE_TE_FP8TENSOR and isinstance(tensor, Float8Tensor)
  
imports: import collections
  from typing import Callable, Dict, Iterable, Optional, Union
  import torch
  from apex.contrib.optimizers.distributed_fused_adam import DistributedFusedAdam, _disable_pre_forward_hook, _multi_tensor_copy
  from megatron.core import parallel_state
  from megatron.core.dist_checkpointing.dict_utils import dict_list_map_inplace
  from megatron.core.dist_checkpointing.mapping import ShardedTensor
  from megatron.core.dist_checkpointing.optimizer import get_param_id_to_sharded_param_map, optim_state_to_sharding_state
  from nemo.utils import str_to_dtype
label_desc: Use image node_id 1 for calling a global function with example usage: _is_fp8_tensor(tensor) and returns: unknown