code: def zero(self):
      for i in range(self.config.num_hidden_layers):
          self.key_states[i].zero_()
          self.value_states[i].zero_()
  
imports: import sys
  import torch
  from torch import nn
  import torch.nn.functional
  from safetensors import safe_open
  import cuda_ext
  import json
  import math
  import gc
  from enum import Enum
label_desc: Use image node_id 2 for calling the ExLlamaCache obj's underlying member method code with example usage: obj.zero() without return types