code: def _set_last_kv_cache(self, last_kv_cache):
      self.last_kv_cache = last_kv_cache
  
imports: import torch
  from torch import nn
  from typing import Optional, Tuple, List, Type, Dict
  from transformers import LlamaConfig
  from bigdl.llm.vllm.sequence import SequenceOutputs, SequenceGroupMetadata
  from bigdl.llm.transformers.models.utils import extend_kv_cache
  from bigdl.llm.vllm.logger import init_logger
label_desc: Use image node_id 2 for calling the BigDLModelForCausalLM obj's underlying member method code with example usage: obj._set_last_kv_cache(last_kv_cache) without return types