code: def _unpack(self):
      self.packed_ih.set_(
          torch.fbgemm_pack_quantized_matrix(self.weight_ih)
      )
      self.packed_hh.set_(
          torch.fbgemm_pack_quantized_matrix(self.weight_hh)
      )
  
imports: import warnings
  from typing import List, Optional, Tuple
  import torch
  from torch import _VF, Tensor
  from torch.nn.utils.rnn import PackedSequence
label_desc: Use image node_id 5 for calling the QuantizedRNNCellBase obj's underlying member method code with example usage: obj._unpack() without return types